1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 /* 39 * hci.c 40 * 41 * Created by Matthias Ringwald on 4/29/09. 42 * 43 */ 44 45 #include "btstack_config.h" 46 47 48 #ifdef ENABLE_CLASSIC 49 #ifdef HAVE_EMBEDDED_TICK 50 #include "btstack_run_loop_embedded.h" 51 #endif 52 #endif 53 54 #ifdef HAVE_PLATFORM_IPHONE_OS 55 #include "../port/ios/src/btstack_control_iphone.h" 56 #endif 57 58 #ifdef ENABLE_BLE 59 #include "gap.h" 60 #endif 61 62 #include <stdarg.h> 63 #include <string.h> 64 #include <stdio.h> 65 #include <inttypes.h> 66 67 #include "btstack_debug.h" 68 #include "btstack_event.h" 69 #include "btstack_linked_list.h" 70 #include "btstack_memory.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 76 77 #define HCI_CONNECTION_TIMEOUT_MS 10000 78 #define HCI_RESET_RESEND_TIMEOUT_MS 200 79 80 // prototypes 81 #ifdef ENABLE_CLASSIC 82 static void hci_update_scan_enable(void); 83 static void hci_emit_discoverable_enabled(uint8_t enabled); 84 static int hci_local_ssp_activated(void); 85 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 86 static void hci_notify_if_sco_can_send_now(void); 87 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 88 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 89 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 90 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 91 static void hci_connection_timestamp(hci_connection_t *connection); 92 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 93 #endif 94 static int hci_power_control_on(void); 95 static void hci_power_control_off(void); 96 static void hci_state_reset(void); 97 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 98 static void hci_emit_nr_connections_changed(void); 99 static void hci_emit_hci_open_failed(void); 100 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 101 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 102 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 103 static void hci_run(void); 104 static int hci_is_le_connection(hci_connection_t * connection); 105 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 106 107 #ifdef ENABLE_BLE 108 // called from test/ble_client/advertising_data_parser.c 109 void le_handle_advertisement_report(uint8_t *packet, int size); 110 #ifdef ENABLE_LE_CENTRAL 111 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 112 #endif 113 #endif 114 115 // the STACK is here 116 #ifndef HAVE_MALLOC 117 static hci_stack_t hci_stack_static; 118 #endif 119 static hci_stack_t * hci_stack = NULL; 120 121 #ifdef ENABLE_CLASSIC 122 // test helper 123 static uint8_t disable_l2cap_timeouts = 0; 124 #endif 125 126 /** 127 * create connection for given address 128 * 129 * @return connection OR NULL, if no memory left 130 */ 131 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 132 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 133 hci_connection_t * conn = btstack_memory_hci_connection_get(); 134 if (!conn) return NULL; 135 memset(conn, 0, sizeof(hci_connection_t)); 136 bd_addr_copy(conn->address, addr); 137 conn->address_type = addr_type; 138 conn->con_handle = 0xffff; 139 conn->authentication_flags = AUTH_FLAGS_NONE; 140 conn->bonding_flags = 0; 141 conn->requested_security_level = LEVEL_0; 142 #ifdef ENABLE_CLASSIC 143 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 144 btstack_run_loop_set_timer_context(&conn->timeout, conn); 145 hci_connection_timestamp(conn); 146 #endif 147 conn->acl_recombination_length = 0; 148 conn->acl_recombination_pos = 0; 149 conn->num_acl_packets_sent = 0; 150 conn->num_sco_packets_sent = 0; 151 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 152 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 153 return conn; 154 } 155 156 157 /** 158 * get le connection parameter range 159 * 160 * @return le connection parameter range struct 161 */ 162 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 163 *range = hci_stack->le_connection_parameter_range; 164 } 165 166 /** 167 * set le connection parameter range 168 * 169 */ 170 171 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 172 hci_stack->le_connection_parameter_range = *range; 173 } 174 175 /** 176 * get hci connections iterator 177 * 178 * @return hci connections iterator 179 */ 180 181 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 182 btstack_linked_list_iterator_init(it, &hci_stack->connections); 183 } 184 185 /** 186 * get connection for a given handle 187 * 188 * @return connection OR NULL, if not found 189 */ 190 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 191 btstack_linked_list_iterator_t it; 192 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 193 while (btstack_linked_list_iterator_has_next(&it)){ 194 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 195 if ( item->con_handle == con_handle ) { 196 return item; 197 } 198 } 199 return NULL; 200 } 201 202 /** 203 * get connection for given address 204 * 205 * @return connection OR NULL, if not found 206 */ 207 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 208 btstack_linked_list_iterator_t it; 209 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 210 while (btstack_linked_list_iterator_has_next(&it)){ 211 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 212 if (connection->address_type != addr_type) continue; 213 if (memcmp(addr, connection->address, 6) != 0) continue; 214 return connection; 215 } 216 return NULL; 217 } 218 219 220 #ifdef ENABLE_CLASSIC 221 222 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 223 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 224 #ifdef HAVE_EMBEDDED_TICK 225 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 226 // connections might be timed out 227 hci_emit_l2cap_check_timeout(connection); 228 } 229 #else 230 if (btstack_run_loop_get_time_ms() > connection->timestamp + HCI_CONNECTION_TIMEOUT_MS){ 231 // connections might be timed out 232 hci_emit_l2cap_check_timeout(connection); 233 } 234 #endif 235 } 236 237 static void hci_connection_timestamp(hci_connection_t *connection){ 238 #ifdef HAVE_EMBEDDED_TICK 239 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 240 #else 241 connection->timestamp = btstack_run_loop_get_time_ms(); 242 #endif 243 } 244 245 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 246 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 247 } 248 249 250 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 251 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 252 } 253 254 /** 255 * add authentication flags and reset timer 256 * @note: assumes classic connection 257 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 258 */ 259 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 260 bd_addr_t addr; 261 reverse_bd_addr(bd_addr, addr); 262 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 263 if (conn) { 264 connectionSetAuthenticationFlags(conn, flags); 265 hci_connection_timestamp(conn); 266 } 267 } 268 269 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 270 hci_connection_t * conn = hci_connection_for_handle(handle); 271 if (!conn) return 0; 272 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 273 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 274 return 0; 275 } 276 277 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 278 if (!hci_stack->link_key_db) return; 279 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 280 hci_stack->link_key_db->delete_link_key(addr); 281 } 282 283 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 284 if (!hci_stack->link_key_db) return; 285 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 286 hci_stack->link_key_db->put_link_key(addr, link_key, type); 287 } 288 #endif 289 290 static int hci_is_le_connection(hci_connection_t * connection){ 291 return connection->address_type == BD_ADDR_TYPE_LE_PUBLIC || 292 connection->address_type == BD_ADDR_TYPE_LE_RANDOM; 293 } 294 295 /** 296 * count connections 297 */ 298 static int nr_hci_connections(void){ 299 int count = 0; 300 btstack_linked_item_t *it; 301 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next, count++); 302 return count; 303 } 304 305 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 306 307 unsigned int num_packets_sent_classic = 0; 308 unsigned int num_packets_sent_le = 0; 309 310 btstack_linked_item_t *it; 311 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 312 hci_connection_t * connection = (hci_connection_t *) it; 313 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 314 num_packets_sent_classic += connection->num_acl_packets_sent; 315 } else { 316 num_packets_sent_le += connection->num_acl_packets_sent; 317 } 318 } 319 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 320 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 321 int free_slots_le = 0; 322 323 if (free_slots_classic < 0){ 324 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 325 return 0; 326 } 327 328 if (hci_stack->le_acl_packets_total_num){ 329 // if we have LE slots, they are used 330 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 331 if (free_slots_le < 0){ 332 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 333 return 0; 334 } 335 } else { 336 // otherwise, classic slots are used for LE, too 337 free_slots_classic -= num_packets_sent_le; 338 if (free_slots_classic < 0){ 339 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 340 return 0; 341 } 342 } 343 344 switch (address_type){ 345 case BD_ADDR_TYPE_UNKNOWN: 346 log_error("hci_number_free_acl_slots: unknown address type"); 347 return 0; 348 349 case BD_ADDR_TYPE_CLASSIC: 350 return free_slots_classic; 351 352 default: 353 if (hci_stack->le_acl_packets_total_num){ 354 return free_slots_le; 355 } 356 return free_slots_classic; 357 } 358 } 359 360 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 361 // get connection type 362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 363 if (!connection){ 364 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 365 return 0; 366 } 367 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 368 } 369 370 #ifdef ENABLE_CLASSIC 371 static int hci_number_free_sco_slots(void){ 372 unsigned int num_sco_packets_sent = 0; 373 btstack_linked_item_t *it; 374 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 375 hci_connection_t * connection = (hci_connection_t *) it; 376 num_sco_packets_sent += connection->num_sco_packets_sent; 377 } 378 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 379 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 380 return 0; 381 } 382 // log_info("hci_number_free_sco_slots u", handle, num_sco_packets_sent); 383 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 384 } 385 #endif 386 387 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 388 int hci_can_send_command_packet_now(void){ 389 if (hci_stack->hci_packet_buffer_reserved) return 0; 390 391 // check for async hci transport implementations 392 if (hci_stack->hci_transport->can_send_packet_now){ 393 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 394 return 0; 395 } 396 } 397 398 return hci_stack->num_cmd_packets > 0; 399 } 400 401 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 402 // check for async hci transport implementations 403 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 404 return hci_stack->hci_transport->can_send_packet_now(packet_type); 405 } 406 407 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 408 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 409 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 410 } 411 412 int hci_can_send_acl_le_packet_now(void){ 413 if (hci_stack->hci_packet_buffer_reserved) return 0; 414 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 415 } 416 417 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 418 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 419 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 420 } 421 422 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 423 if (hci_stack->hci_packet_buffer_reserved) return 0; 424 return hci_can_send_prepared_acl_packet_now(con_handle); 425 } 426 427 #ifdef ENABLE_CLASSIC 428 int hci_can_send_acl_classic_packet_now(void){ 429 if (hci_stack->hci_packet_buffer_reserved) return 0; 430 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_CLASSIC); 431 } 432 433 int hci_can_send_prepared_sco_packet_now(void){ 434 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 435 if (!hci_stack->synchronous_flow_control_enabled) return 1; 436 return hci_number_free_sco_slots() > 0; 437 } 438 439 int hci_can_send_sco_packet_now(void){ 440 if (hci_stack->hci_packet_buffer_reserved) return 0; 441 return hci_can_send_prepared_sco_packet_now(); 442 } 443 444 void hci_request_sco_can_send_now_event(void){ 445 hci_stack->sco_waiting_for_can_send_now = 1; 446 hci_notify_if_sco_can_send_now(); 447 } 448 #endif 449 450 // used for internal checks in l2cap.c 451 int hci_is_packet_buffer_reserved(void){ 452 return hci_stack->hci_packet_buffer_reserved; 453 } 454 455 // reserves outgoing packet buffer. @returns 1 if successful 456 int hci_reserve_packet_buffer(void){ 457 if (hci_stack->hci_packet_buffer_reserved) { 458 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 459 return 0; 460 } 461 hci_stack->hci_packet_buffer_reserved = 1; 462 return 1; 463 } 464 465 void hci_release_packet_buffer(void){ 466 hci_stack->hci_packet_buffer_reserved = 0; 467 } 468 469 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 470 static int hci_transport_synchronous(void){ 471 return hci_stack->hci_transport->can_send_packet_now == NULL; 472 } 473 474 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 475 476 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 477 478 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 479 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 480 if (hci_is_le_connection(connection) && hci_stack->le_data_packets_length > 0){ 481 max_acl_data_packet_length = hci_stack->le_data_packets_length; 482 } 483 484 // testing: reduce buffer to minimum 485 // max_acl_data_packet_length = 52; 486 487 log_debug("hci_send_acl_packet_fragments entered"); 488 489 int err; 490 // multiple packets could be send on a synchronous HCI transport 491 while (1){ 492 493 log_debug("hci_send_acl_packet_fragments loop entered"); 494 495 // get current data 496 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4; 497 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 498 int more_fragments = 0; 499 500 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 501 if (current_acl_data_packet_length > max_acl_data_packet_length){ 502 more_fragments = 1; 503 current_acl_data_packet_length = max_acl_data_packet_length; 504 } 505 506 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 507 if (acl_header_pos > 0){ 508 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 509 handle_and_flags = (handle_and_flags & 0xcfff) | (1 << 12); 510 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 511 } 512 513 // update header len 514 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2, current_acl_data_packet_length); 515 516 // count packet 517 connection->num_acl_packets_sent++; 518 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 519 520 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 521 if (more_fragments){ 522 // update start of next fragment to send 523 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 524 } else { 525 // done 526 hci_stack->acl_fragmentation_pos = 0; 527 hci_stack->acl_fragmentation_total_size = 0; 528 } 529 530 // send packet 531 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 532 const int size = current_acl_data_packet_length + 4; 533 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 534 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 535 536 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 537 538 // done yet? 539 if (!more_fragments) break; 540 541 // can send more? 542 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 543 } 544 545 log_debug("hci_send_acl_packet_fragments loop over"); 546 547 // release buffer now for synchronous transport 548 if (hci_transport_synchronous()){ 549 hci_release_packet_buffer(); 550 // notify upper stack that it might be possible to send again 551 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 552 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 553 } 554 555 return err; 556 } 557 558 // pre: caller has reserved the packet buffer 559 int hci_send_acl_packet_buffer(int size){ 560 561 // log_info("hci_send_acl_packet_buffer size %u", size); 562 563 if (!hci_stack->hci_packet_buffer_reserved) { 564 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 565 return 0; 566 } 567 568 uint8_t * packet = hci_stack->hci_packet_buffer; 569 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 570 571 // check for free places on Bluetooth module 572 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 573 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 574 hci_release_packet_buffer(); 575 return BTSTACK_ACL_BUFFERS_FULL; 576 } 577 578 hci_connection_t *connection = hci_connection_for_handle( con_handle); 579 if (!connection) { 580 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 581 hci_release_packet_buffer(); 582 return 0; 583 } 584 585 #ifdef ENABLE_CLASSIC 586 hci_connection_timestamp(connection); 587 #endif 588 589 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 590 591 // setup data 592 hci_stack->acl_fragmentation_total_size = size; 593 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 594 595 return hci_send_acl_packet_fragments(connection); 596 } 597 598 #ifdef ENABLE_CLASSIC 599 // pre: caller has reserved the packet buffer 600 int hci_send_sco_packet_buffer(int size){ 601 602 // log_info("hci_send_acl_packet_buffer size %u", size); 603 604 if (!hci_stack->hci_packet_buffer_reserved) { 605 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 606 return 0; 607 } 608 609 uint8_t * packet = hci_stack->hci_packet_buffer; 610 611 // skip checks in loopback mode 612 if (!hci_stack->loopback_mode){ 613 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 614 615 // check for free places on Bluetooth module 616 if (!hci_can_send_prepared_sco_packet_now()) { 617 log_error("hci_send_sco_packet_buffer called but no free ACL buffers on controller"); 618 hci_release_packet_buffer(); 619 return BTSTACK_ACL_BUFFERS_FULL; 620 } 621 622 // track send packet in connection struct 623 hci_connection_t *connection = hci_connection_for_handle( con_handle); 624 if (!connection) { 625 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 626 hci_release_packet_buffer(); 627 return 0; 628 } 629 connection->num_sco_packets_sent++; 630 } 631 632 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 633 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 634 635 if (hci_transport_synchronous()){ 636 hci_release_packet_buffer(); 637 // notify upper stack that it might be possible to send again 638 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 639 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 640 } 641 642 return err; 643 } 644 #endif 645 646 static void acl_handler(uint8_t *packet, int size){ 647 648 // log_info("acl_handler: size %u", size); 649 650 // get info 651 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 652 hci_connection_t *conn = hci_connection_for_handle(con_handle); 653 uint8_t acl_flags = READ_ACL_FLAGS(packet); 654 uint16_t acl_length = READ_ACL_LENGTH(packet); 655 656 // ignore non-registered handle 657 if (!conn){ 658 log_error( "hci.c: acl_handler called with non-registered handle %u!" , con_handle); 659 return; 660 } 661 662 // assert packet is complete 663 if (acl_length + 4 != size){ 664 log_error("hci.c: acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 665 return; 666 } 667 668 #ifdef ENABLE_CLASSIC 669 // update idle timestamp 670 hci_connection_timestamp(conn); 671 #endif 672 673 // handle different packet types 674 switch (acl_flags & 0x03) { 675 676 case 0x01: // continuation fragment 677 678 // sanity checks 679 if (conn->acl_recombination_pos == 0) { 680 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 681 return; 682 } 683 if (conn->acl_recombination_pos + acl_length > 4 + HCI_ACL_BUFFER_SIZE){ 684 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 685 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 686 conn->acl_recombination_pos = 0; 687 return; 688 } 689 690 // append fragment payload (header already stored) 691 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], &packet[4], acl_length ); 692 conn->acl_recombination_pos += acl_length; 693 694 // log_error( "ACL Cont Fragment: acl_len %u, combined_len %u, l2cap_len %u", acl_length, 695 // conn->acl_recombination_pos, conn->acl_recombination_length); 696 697 // forward complete L2CAP packet if complete. 698 if (conn->acl_recombination_pos >= conn->acl_recombination_length + 4 + 4){ // pos already incl. ACL header 699 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 700 // reset recombination buffer 701 conn->acl_recombination_length = 0; 702 conn->acl_recombination_pos = 0; 703 } 704 break; 705 706 case 0x02: { // first fragment 707 708 // sanity check 709 if (conn->acl_recombination_pos) { 710 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 711 conn->acl_recombination_pos = 0; 712 } 713 714 // peek into L2CAP packet! 715 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 716 717 // log_info( "ACL First Fragment: acl_len %u, l2cap_len %u", acl_length, l2cap_length); 718 719 // compare fragment size to L2CAP packet size 720 if (acl_length >= l2cap_length + 4){ 721 // forward fragment as L2CAP packet 722 hci_emit_acl_packet(packet, acl_length + 4); 723 } else { 724 725 if (acl_length > HCI_ACL_BUFFER_SIZE){ 726 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 727 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 728 return; 729 } 730 731 // store first fragment and tweak acl length for complete package 732 memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], packet, acl_length + 4); 733 conn->acl_recombination_pos = acl_length + 4; 734 conn->acl_recombination_length = l2cap_length; 735 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2, l2cap_length +4); 736 } 737 break; 738 739 } 740 default: 741 log_error( "hci.c: acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 742 return; 743 } 744 745 // execute main loop 746 hci_run(); 747 } 748 749 static void hci_shutdown_connection(hci_connection_t *conn){ 750 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 751 752 btstack_run_loop_remove_timer(&conn->timeout); 753 754 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 755 btstack_memory_hci_connection_free( conn ); 756 757 // now it's gone 758 hci_emit_nr_connections_changed(); 759 } 760 761 #ifdef ENABLE_CLASSIC 762 763 static const uint16_t packet_type_sizes[] = { 764 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 765 HCI_ACL_DH1_SIZE, 0, 0, 0, 766 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 767 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 768 }; 769 static const uint8_t packet_type_feature_requirement_bit[] = { 770 0, // 3 slot packets 771 1, // 5 slot packets 772 25, // EDR 2 mpbs 773 26, // EDR 3 mbps 774 39, // 3 slot EDR packts 775 40, // 5 slot EDR packet 776 }; 777 static const uint16_t packet_type_feature_packet_mask[] = { 778 0x0f00, // 3 slot packets 779 0xf000, // 5 slot packets 780 0x1102, // EDR 2 mpbs 781 0x2204, // EDR 3 mbps 782 0x0300, // 3 slot EDR packts 783 0x3000, // 5 slot EDR packet 784 }; 785 786 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 787 // enable packet types based on size 788 uint16_t packet_types = 0; 789 unsigned int i; 790 for (i=0;i<16;i++){ 791 if (packet_type_sizes[i] == 0) continue; 792 if (packet_type_sizes[i] <= buffer_size){ 793 packet_types |= 1 << i; 794 } 795 } 796 // disable packet types due to missing local supported features 797 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 798 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 799 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 800 if (feature_set) continue; 801 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 802 packet_types &= ~packet_type_feature_packet_mask[i]; 803 } 804 // flip bits for "may not be used" 805 packet_types ^= 0x3306; 806 return packet_types; 807 } 808 809 uint16_t hci_usable_acl_packet_types(void){ 810 return hci_stack->packet_types; 811 } 812 #endif 813 814 uint8_t* hci_get_outgoing_packet_buffer(void){ 815 // hci packet buffer is >= acl data packet length 816 return hci_stack->hci_packet_buffer; 817 } 818 819 uint16_t hci_max_acl_data_packet_length(void){ 820 return hci_stack->acl_data_packet_length; 821 } 822 823 #ifdef ENABLE_CLASSIC 824 int hci_extended_sco_link_supported(void){ 825 // No. 31, byte 3, bit 7 826 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 827 } 828 #endif 829 830 int hci_non_flushable_packet_boundary_flag_supported(void){ 831 // No. 54, byte 6, bit 6 832 return (hci_stack->local_supported_features[6] & (1 << 6)) != 0; 833 } 834 835 static int gap_ssp_supported(void){ 836 // No. 51, byte 6, bit 3 837 return (hci_stack->local_supported_features[6] & (1 << 3)) != 0; 838 } 839 840 static int hci_classic_supported(void){ 841 #ifdef ENABLE_CLASSIC 842 // No. 37, byte 4, bit 5, = No BR/EDR Support 843 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 844 #else 845 return 0; 846 #endif 847 } 848 849 static int hci_le_supported(void){ 850 #ifdef ENABLE_BLE 851 // No. 37, byte 4, bit 6 = LE Supported (Controller) 852 return (hci_stack->local_supported_features[4] & (1 << 6)) != 0; 853 #else 854 return 0; 855 #endif 856 } 857 858 // get addr type and address used in advertisement packets 859 void gap_advertisements_get_address(uint8_t * addr_type, bd_addr_t addr){ 860 *addr_type = hci_stack->adv_addr_type; 861 if (hci_stack->adv_addr_type){ 862 memcpy(addr, hci_stack->adv_address, 6); 863 } else { 864 memcpy(addr, hci_stack->local_bd_addr, 6); 865 } 866 } 867 868 #ifdef ENABLE_BLE 869 void le_handle_advertisement_report(uint8_t *packet, int size){ 870 871 UNUSED(size); 872 873 int offset = 3; 874 int num_reports = packet[offset]; 875 offset += 1; 876 877 int i; 878 // log_info("HCI: handle adv report with num reports: %d", num_reports); 879 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 880 for (i=0; i<num_reports;i++){ 881 uint8_t data_length = packet[offset + 8]; 882 uint8_t event_size = 10 + data_length; 883 int pos = 0; 884 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 885 event[pos++] = event_size; 886 memcpy(&event[pos], &packet[offset], 1+1+6); // event type + address type + address 887 offset += 8; 888 pos += 8; 889 event[pos++] = packet[offset + 1 + data_length]; // rssi 890 event[pos++] = packet[offset++]; //data_length; 891 memcpy(&event[pos], &packet[offset], data_length); 892 pos += data_length; 893 offset += data_length + 1; // rssi 894 hci_emit_event(event, pos, 1); 895 } 896 } 897 #endif 898 899 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 900 901 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 902 if (!hci_stack->config) return 0; 903 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 904 // Limit baud rate for Broadcom chipsets to 3 mbps 905 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION && baud_rate > 3000000){ 906 baud_rate = 3000000; 907 } 908 return baud_rate; 909 } 910 911 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 912 UNUSED(ds); 913 914 switch (hci_stack->substate){ 915 case HCI_INIT_W4_SEND_RESET: 916 log_info("Resend HCI Reset"); 917 hci_stack->substate = HCI_INIT_SEND_RESET; 918 hci_stack->num_cmd_packets = 1; 919 hci_run(); 920 break; 921 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 922 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 923 if (hci_stack->hci_transport->reset_link){ 924 hci_stack->hci_transport->reset_link(); 925 } 926 // no break - explicit fallthrough to HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT 927 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 928 log_info("Resend HCI Reset - CSR Warm Boot"); 929 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 930 hci_stack->num_cmd_packets = 1; 931 hci_run(); 932 break; 933 case HCI_INIT_W4_SEND_BAUD_CHANGE: 934 if (hci_stack->hci_transport->set_baudrate){ 935 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 936 log_info("Local baud rate change to %"PRIu32"(timeout handler)", baud_rate); 937 hci_stack->hci_transport->set_baudrate(baud_rate); 938 } 939 // For CSR, HCI Reset is sent on new baud rate 940 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 941 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 942 hci_run(); 943 } 944 break; 945 default: 946 break; 947 } 948 } 949 #endif 950 951 static void hci_initializing_next_state(void){ 952 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 953 } 954 955 // assumption: hci_can_send_command_packet_now() == true 956 static void hci_initializing_run(void){ 957 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 958 switch (hci_stack->substate){ 959 case HCI_INIT_SEND_RESET: 960 hci_state_reset(); 961 962 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 963 // prepare reset if command complete not received in 100ms 964 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 965 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 966 btstack_run_loop_add_timer(&hci_stack->timeout); 967 #endif 968 // send command 969 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 970 hci_send_cmd(&hci_reset); 971 break; 972 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 973 hci_send_cmd(&hci_read_local_version_information); 974 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 975 break; 976 case HCI_INIT_SEND_READ_LOCAL_NAME: 977 hci_send_cmd(&hci_read_local_name); 978 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 979 break; 980 981 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 982 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 983 hci_state_reset(); 984 // prepare reset if command complete not received in 100ms 985 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 986 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 987 btstack_run_loop_add_timer(&hci_stack->timeout); 988 // send command 989 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 990 hci_send_cmd(&hci_reset); 991 break; 992 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 993 hci_state_reset(); 994 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 995 hci_send_cmd(&hci_reset); 996 break; 997 case HCI_INIT_SEND_BAUD_CHANGE: { 998 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 999 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1000 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1001 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1002 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1003 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1004 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1005 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1006 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1007 btstack_run_loop_add_timer(&hci_stack->timeout); 1008 } 1009 break; 1010 } 1011 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1012 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1013 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1014 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1015 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1016 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1017 break; 1018 } 1019 case HCI_INIT_CUSTOM_INIT: 1020 // Custom initialization 1021 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1022 int valid_cmd = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1023 if (valid_cmd){ 1024 int size = 3 + hci_stack->hci_packet_buffer[2]; 1025 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1026 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1027 switch (valid_cmd) { 1028 case 1: 1029 default: 1030 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1031 break; 1032 case 2: // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1033 log_info("CSR Warm Boot"); 1034 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1035 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1036 btstack_run_loop_add_timer(&hci_stack->timeout); 1037 if (hci_stack->manufacturer == COMPANY_ID_CAMBRIDGE_SILICON_RADIO 1038 && hci_stack->config 1039 && hci_stack->chipset 1040 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1041 && hci_stack->hci_transport->set_baudrate 1042 && hci_transport_uart_get_main_baud_rate()){ 1043 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1044 } else { 1045 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1046 } 1047 break; 1048 } 1049 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1050 break; 1051 } 1052 log_info("Init script done"); 1053 1054 // Init script download causes baud rate to reset on Broadcom chipsets, restore UART baud rate if needed 1055 if (hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1056 int need_baud_change = hci_stack->config 1057 && hci_stack->chipset 1058 && hci_stack->chipset->set_baudrate_command 1059 && hci_stack->hci_transport->set_baudrate 1060 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1061 if (need_baud_change) { 1062 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1063 log_info("Local baud rate change to %"PRIu32" after init script (bcm)", baud_rate); 1064 hci_stack->hci_transport->set_baudrate(baud_rate); 1065 } 1066 } 1067 } 1068 // otherwise continue 1069 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1070 hci_send_cmd(&hci_read_local_supported_commands); 1071 break; 1072 case HCI_INIT_SET_BD_ADDR: 1073 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1074 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1075 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1076 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1077 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3 + hci_stack->hci_packet_buffer[2]); 1078 break; 1079 #endif 1080 1081 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1082 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1083 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1084 hci_send_cmd(&hci_read_local_supported_commands); 1085 break; 1086 case HCI_INIT_READ_BD_ADDR: 1087 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1088 hci_send_cmd(&hci_read_bd_addr); 1089 break; 1090 case HCI_INIT_READ_BUFFER_SIZE: 1091 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1092 hci_send_cmd(&hci_read_buffer_size); 1093 break; 1094 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1095 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1096 hci_send_cmd(&hci_read_local_supported_features); 1097 break; 1098 case HCI_INIT_SET_EVENT_MASK: 1099 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1100 if (hci_le_supported()){ 1101 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1102 } else { 1103 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1104 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1105 } 1106 break; 1107 #ifdef ENABLE_CLASSIC 1108 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1109 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1110 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1111 break; 1112 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1113 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1114 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1115 break; 1116 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1117 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1118 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1119 break; 1120 case HCI_INIT_WRITE_LOCAL_NAME: 1121 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1122 if (hci_stack->local_name){ 1123 hci_send_cmd(&hci_write_local_name, hci_stack->local_name); 1124 } else { 1125 char local_name[8+17+1]; 1126 // BTstack 11:22:33:44:55:66 1127 memcpy(local_name, "BTstack ", 8); 1128 memcpy(&local_name[8], bd_addr_to_str(hci_stack->local_bd_addr), 17); // strlen(bd_addr_to_str(...)) = 17 1129 local_name[8+17] = '\0'; 1130 log_info("---> Name %s", local_name); 1131 hci_send_cmd(&hci_write_local_name, local_name); 1132 } 1133 break; 1134 case HCI_INIT_WRITE_EIR_DATA: 1135 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1136 hci_send_cmd(&hci_write_extended_inquiry_response, 0, hci_stack->eir_data); 1137 break; 1138 case HCI_INIT_WRITE_INQUIRY_MODE: 1139 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1140 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1141 break; 1142 case HCI_INIT_WRITE_SCAN_ENABLE: 1143 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1144 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1145 break; 1146 // only sent if ENABLE_SCO_OVER_HCI is defined 1147 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1148 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1149 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1150 break; 1151 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1152 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1153 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1154 break; 1155 #endif 1156 #ifdef ENABLE_BLE 1157 // LE INIT 1158 case HCI_INIT_LE_READ_BUFFER_SIZE: 1159 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1160 hci_send_cmd(&hci_le_read_buffer_size); 1161 break; 1162 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1163 // LE Supported Host = 1, Simultaneous Host = 0 1164 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1165 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1166 break; 1167 case HCI_INIT_READ_WHITE_LIST_SIZE: 1168 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1169 hci_send_cmd(&hci_le_read_white_list_size); 1170 break; 1171 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1172 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, public address, accept all advs 1173 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1174 hci_send_cmd(&hci_le_set_scan_parameters, 1, 0x1e0, 0x30, 0, 0); 1175 break; 1176 #endif 1177 default: 1178 return; 1179 } 1180 } 1181 1182 static void hci_init_done(void){ 1183 // done. tell the app 1184 log_info("hci_init_done -> HCI_STATE_WORKING"); 1185 hci_stack->state = HCI_STATE_WORKING; 1186 hci_emit_state(); 1187 hci_run(); 1188 } 1189 1190 static void hci_initializing_event_handler(uint8_t * packet, uint16_t size){ 1191 UNUSED(size); 1192 1193 uint8_t command_completed = 0; 1194 1195 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1196 uint16_t opcode = little_endian_read_16(packet,3); 1197 if (opcode == hci_stack->last_cmd_opcode){ 1198 command_completed = 1; 1199 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1200 } else { 1201 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1202 } 1203 } 1204 1205 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1206 uint8_t status = packet[2]; 1207 uint16_t opcode = little_endian_read_16(packet,4); 1208 if (opcode == hci_stack->last_cmd_opcode){ 1209 if (status){ 1210 command_completed = 1; 1211 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1212 } else { 1213 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1214 } 1215 } else { 1216 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1217 } 1218 } 1219 1220 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1221 1222 // Vendor == CSR 1223 if (hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1224 // TODO: track actual command 1225 command_completed = 1; 1226 } 1227 1228 // Vendor == Toshiba 1229 if (hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE && hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC){ 1230 // TODO: track actual command 1231 command_completed = 1; 1232 } 1233 1234 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1235 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1236 // 1237 // HCI Reset 1238 // Timeout 100 ms 1239 // HCI Reset 1240 // Command Complete Reset 1241 // HCI Read Local Version Information 1242 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1243 // hang... 1244 // 1245 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1246 if (!command_completed 1247 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1248 && hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION){ 1249 1250 uint16_t opcode = little_endian_read_16(packet,3); 1251 if (opcode == hci_reset.opcode){ 1252 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1253 return; 1254 } 1255 } 1256 1257 // CSR & H5 1258 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1259 if (!command_completed 1260 && hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE 1261 && hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS){ 1262 1263 uint16_t opcode = little_endian_read_16(packet,3); 1264 if (opcode == hci_reset.opcode){ 1265 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1266 return; 1267 } 1268 } 1269 1270 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1271 // fix: Correct substate and behave as command below 1272 if (command_completed){ 1273 switch (hci_stack->substate){ 1274 case HCI_INIT_SEND_RESET: 1275 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1276 break; 1277 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1278 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1279 break; 1280 default: 1281 break; 1282 } 1283 } 1284 1285 #endif 1286 1287 if (!command_completed) return; 1288 1289 int need_baud_change = 0; 1290 int need_addr_change = 0; 1291 1292 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1293 need_baud_change = hci_stack->config 1294 && hci_stack->chipset 1295 && hci_stack->chipset->set_baudrate_command 1296 && hci_stack->hci_transport->set_baudrate 1297 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1298 1299 need_addr_change = hci_stack->custom_bd_addr_set 1300 && hci_stack->chipset 1301 && hci_stack->chipset->set_bd_addr_command; 1302 #endif 1303 1304 switch(hci_stack->substate){ 1305 1306 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1307 case HCI_INIT_SEND_RESET: 1308 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1309 // fix: just correct substate and behave as command below 1310 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1311 btstack_run_loop_remove_timer(&hci_stack->timeout); 1312 break; 1313 case HCI_INIT_W4_SEND_RESET: 1314 btstack_run_loop_remove_timer(&hci_stack->timeout); 1315 break; 1316 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1317 log_info("Received local name, need baud change %d", need_baud_change); 1318 if (need_baud_change){ 1319 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1320 return; 1321 } 1322 // skip baud change 1323 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1324 return; 1325 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1326 // for STLC2500D, baud rate change already happened. 1327 // for others, baud rate gets changed now 1328 if ((hci_stack->manufacturer != COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1329 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1330 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change)", baud_rate); 1331 hci_stack->hci_transport->set_baudrate(baud_rate); 1332 } 1333 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1334 return; 1335 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1336 btstack_run_loop_remove_timer(&hci_stack->timeout); 1337 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1338 return; 1339 case HCI_INIT_W4_CUSTOM_INIT: 1340 // repeat custom init 1341 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1342 return; 1343 #else 1344 case HCI_INIT_W4_SEND_RESET: 1345 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1346 return ; 1347 #endif 1348 1349 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1350 if (need_baud_change && hci_stack->manufacturer == COMPANY_ID_BROADCOM_CORPORATION){ 1351 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1352 return; 1353 } 1354 if (need_addr_change){ 1355 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1356 return; 1357 } 1358 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1359 return; 1360 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1361 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1362 if (need_baud_change){ 1363 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1364 log_info("Local baud rate change to %"PRIu32"(w4_send_baud_change_bcm))", baud_rate); 1365 hci_stack->hci_transport->set_baudrate(baud_rate); 1366 } 1367 if (need_addr_change){ 1368 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1369 return; 1370 } 1371 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1372 return; 1373 case HCI_INIT_W4_SET_BD_ADDR: 1374 // for STLC2500D, bd addr change only gets active after sending reset command 1375 if (hci_stack->manufacturer == COMPANY_ID_ST_MICROELECTRONICS){ 1376 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1377 return; 1378 } 1379 // skipping st warm boot 1380 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1381 return; 1382 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1383 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1384 return; 1385 #endif 1386 case HCI_INIT_W4_READ_BD_ADDR: 1387 // only read buffer size if supported 1388 if (hci_stack->local_supported_commands[0] & 0x01) { 1389 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1390 return; 1391 } 1392 // skipping read buffer size 1393 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1394 return; 1395 case HCI_INIT_W4_SET_EVENT_MASK: 1396 // skip Classic init commands for LE only chipsets 1397 if (!hci_classic_supported()){ 1398 if (hci_le_supported()){ 1399 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1400 return; 1401 } else { 1402 log_error("Neither BR/EDR nor LE supported"); 1403 hci_init_done(); 1404 return; 1405 } 1406 } 1407 if (!gap_ssp_supported()){ 1408 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1409 return; 1410 } 1411 break; 1412 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1413 // skip write le host if not supported (e.g. on LE only EM9301) 1414 if (hci_stack->local_supported_commands[0] & 0x02) break; 1415 hci_stack->substate = HCI_INIT_LE_SET_SCAN_PARAMETERS; 1416 return; 1417 case HCI_INIT_W4_WRITE_LOCAL_NAME: 1418 // skip write eir data if no eir data set 1419 if (hci_stack->eir_data) break; 1420 hci_stack->substate = HCI_INIT_WRITE_INQUIRY_MODE; 1421 return; 1422 1423 #ifdef ENABLE_SCO_OVER_HCI 1424 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1425 // skip write synchronous flow control if not supported 1426 if (hci_stack->local_supported_commands[0] & 0x04) break; 1427 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1428 // explicit fall through to reduce repetitions 1429 1430 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1431 // skip write default erroneous data reporting if not supported 1432 if (hci_stack->local_supported_commands[0] & 0x08) break; 1433 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1434 // explicit fall through to reduce repetitions 1435 1436 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1437 if (!hci_le_supported()){ 1438 // SKIP LE init for Classic only configuration 1439 hci_init_done(); 1440 return; 1441 } 1442 break; 1443 #else 1444 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1445 if (!hci_le_supported()){ 1446 // SKIP LE init for Classic only configuration 1447 hci_init_done(); 1448 return; 1449 } 1450 #endif 1451 break; 1452 // Response to command before init done state -> init done 1453 case (HCI_INIT_DONE-1): 1454 hci_init_done(); 1455 return; 1456 1457 default: 1458 break; 1459 } 1460 hci_initializing_next_state(); 1461 } 1462 1463 static void event_handler(uint8_t *packet, int size){ 1464 1465 uint16_t event_length = packet[1]; 1466 1467 // assert packet is complete 1468 if (size != event_length + 2){ 1469 log_error("hci.c: event_handler called with event packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 1470 return; 1471 } 1472 1473 bd_addr_t addr; 1474 bd_addr_type_t addr_type; 1475 uint8_t link_type; 1476 hci_con_handle_t handle; 1477 hci_connection_t * conn; 1478 int i; 1479 1480 // warnings 1481 (void) link_type; 1482 1483 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 1484 1485 switch (hci_event_packet_get_type(packet)) { 1486 1487 case HCI_EVENT_COMMAND_COMPLETE: 1488 // get num cmd packets - limit to 1 to reduce complexity 1489 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1490 1491 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_name)){ 1492 if (packet[5]) break; 1493 // terminate, name 248 chars 1494 packet[6+248] = 0; 1495 log_info("local name: %s", &packet[6]); 1496 } 1497 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_buffer_size)){ 1498 // from offset 5 1499 // status 1500 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1501 hci_stack->acl_data_packet_length = little_endian_read_16(packet, 6); 1502 hci_stack->sco_data_packet_length = packet[8]; 1503 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 1504 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 1505 1506 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1507 // determine usable ACL payload size 1508 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->acl_data_packet_length){ 1509 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 1510 } 1511 log_info("hci_read_buffer_size: acl used size %u, count %u / sco size %u, count %u", 1512 hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 1513 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 1514 } 1515 } 1516 #ifdef ENABLE_BLE 1517 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_buffer_size)){ 1518 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 1519 hci_stack->le_acl_packets_total_num = packet[8]; 1520 // determine usable ACL payload size 1521 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 1522 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 1523 } 1524 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 1525 } 1526 #ifdef ENABLE_LE_CENTRAL 1527 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_le_read_white_list_size)){ 1528 hci_stack->le_whitelist_capacity = little_endian_read_16(packet, 6); 1529 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 1530 } 1531 #endif 1532 #endif 1533 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_bd_addr)) { 1534 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 1535 hci_stack->local_bd_addr); 1536 log_info("Local Address, Status: 0x%02x: Addr: %s", 1537 packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 1538 #ifdef ENABLE_CLASSIC 1539 if (hci_stack->link_key_db){ 1540 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 1541 } 1542 #endif 1543 } 1544 #ifdef ENABLE_CLASSIC 1545 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1546 hci_emit_discoverable_enabled(hci_stack->discoverable); 1547 } 1548 #endif 1549 1550 // Note: HCI init checks 1551 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_features)){ 1552 memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 8); 1553 1554 #ifdef ENABLE_CLASSIC 1555 // determine usable ACL packet types based on host buffer size and supported features 1556 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 1557 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 1558 #endif 1559 // Classic/LE 1560 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 1561 } 1562 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){ 1563 // hci_stack->hci_version = little_endian_read_16(packet, 4); 1564 // hci_stack->hci_revision = little_endian_read_16(packet, 6); 1565 // hci_stack->lmp_version = little_endian_read_16(packet, 8); 1566 hci_stack->manufacturer = little_endian_read_16(packet, 10); 1567 // hci_stack->lmp_subversion = little_endian_read_16(packet, 12); 1568 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 1569 } 1570 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_supported_commands)){ 1571 hci_stack->local_supported_commands[0] = 1572 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+14] & 0x80) >> 7 | // bit 0 = Octet 14, bit 7 1573 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+24] & 0x40) >> 5 | // bit 1 = Octet 24, bit 6 1574 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+10] & 0x10) >> 2 | // bit 2 = Octet 10, bit 4 1575 (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1+18] & 0x08); // bit 3 = Octet 18, bit 3 1576 log_info("Local supported commands summary 0x%02x", hci_stack->local_supported_commands[0]); 1577 } 1578 if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_synchronous_flow_control_enable)){ 1579 if (packet[5] == 0){ 1580 hci_stack->synchronous_flow_control_enabled = 1; 1581 } 1582 } 1583 break; 1584 1585 case HCI_EVENT_COMMAND_STATUS: 1586 // get num cmd packets - limit to 1 to reduce complexity 1587 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 1588 break; 1589 1590 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 1591 int offset = 3; 1592 for (i=0; i<packet[2];i++){ 1593 handle = little_endian_read_16(packet, offset); 1594 offset += 2; 1595 uint16_t num_packets = little_endian_read_16(packet, offset); 1596 offset += 2; 1597 1598 conn = hci_connection_for_handle(handle); 1599 if (!conn){ 1600 log_error("hci_number_completed_packet lists unused con handle %u", handle); 1601 continue; 1602 } 1603 1604 if (conn->address_type == BD_ADDR_TYPE_SCO){ 1605 #ifdef ENABLE_CLASSIC 1606 if (conn->num_sco_packets_sent >= num_packets){ 1607 conn->num_sco_packets_sent -= num_packets; 1608 } else { 1609 log_error("hci_number_completed_packets, more sco slots freed then sent."); 1610 conn->num_sco_packets_sent = 0; 1611 } 1612 hci_notify_if_sco_can_send_now(); 1613 #endif 1614 } else { 1615 if (conn->num_acl_packets_sent >= num_packets){ 1616 conn->num_acl_packets_sent -= num_packets; 1617 } else { 1618 log_error("hci_number_completed_packets, more acl slots freed then sent."); 1619 conn->num_acl_packets_sent = 0; 1620 } 1621 } 1622 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_acl_packets_sent); 1623 } 1624 break; 1625 } 1626 1627 #ifdef ENABLE_CLASSIC 1628 case HCI_EVENT_CONNECTION_REQUEST: 1629 reverse_bd_addr(&packet[2], addr); 1630 // TODO: eval COD 8-10 1631 link_type = packet[11]; 1632 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 1633 addr_type = link_type == 1 ? BD_ADDR_TYPE_CLASSIC : BD_ADDR_TYPE_SCO; 1634 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1635 if (!conn) { 1636 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1637 } 1638 if (!conn) { 1639 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 1640 hci_stack->decline_reason = 0x0d; 1641 bd_addr_copy(hci_stack->decline_addr, addr); 1642 break; 1643 } 1644 conn->role = HCI_ROLE_SLAVE; 1645 conn->state = RECEIVED_CONNECTION_REQUEST; 1646 // store info about eSCO 1647 if (link_type == 0x02){ 1648 conn->remote_supported_feature_eSCO = 1; 1649 } 1650 hci_run(); 1651 break; 1652 1653 case HCI_EVENT_CONNECTION_COMPLETE: 1654 // Connection management 1655 reverse_bd_addr(&packet[5], addr); 1656 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1657 addr_type = BD_ADDR_TYPE_CLASSIC; 1658 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1659 if (conn) { 1660 if (!packet[2]){ 1661 conn->state = OPEN; 1662 conn->con_handle = little_endian_read_16(packet, 3); 1663 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES; 1664 1665 // restart timer 1666 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1667 btstack_run_loop_add_timer(&conn->timeout); 1668 1669 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1670 1671 hci_emit_nr_connections_changed(); 1672 } else { 1673 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1674 uint8_t status = packet[2]; 1675 bd_addr_t bd_address; 1676 memcpy(&bd_address, conn->address, 6); 1677 1678 // connection failed, remove entry 1679 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1680 btstack_memory_hci_connection_free( conn ); 1681 1682 // notify client if dedicated bonding 1683 if (notify_dedicated_bonding_failed){ 1684 log_info("hci notify_dedicated_bonding_failed"); 1685 hci_emit_dedicated_bonding_result(bd_address, status); 1686 } 1687 1688 // if authentication error, also delete link key 1689 if (packet[2] == 0x05) { 1690 gap_drop_link_key_for_bd_addr(addr); 1691 } 1692 } 1693 } 1694 break; 1695 1696 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 1697 reverse_bd_addr(&packet[5], addr); 1698 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 1699 if (packet[2]){ 1700 // connection failed 1701 break; 1702 } 1703 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1704 if (!conn) { 1705 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 1706 } 1707 if (!conn) { 1708 break; 1709 } 1710 conn->state = OPEN; 1711 conn->con_handle = little_endian_read_16(packet, 3); 1712 break; 1713 1714 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 1715 handle = little_endian_read_16(packet, 3); 1716 conn = hci_connection_for_handle(handle); 1717 if (!conn) break; 1718 if (!packet[2]){ 1719 uint8_t * features = &packet[5]; 1720 if (features[6] & (1 << 3)){ 1721 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP; 1722 } 1723 if (features[3] & (1<<7)){ 1724 conn->remote_supported_feature_eSCO = 1; 1725 } 1726 } 1727 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1728 log_info("HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, bonding flags %x, eSCO %u", conn->bonding_flags, conn->remote_supported_feature_eSCO); 1729 if (conn->bonding_flags & BONDING_DEDICATED){ 1730 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1731 } 1732 break; 1733 1734 case HCI_EVENT_LINK_KEY_REQUEST: 1735 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 1736 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 1737 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 1738 if (hci_stack->bondable && !hci_stack->link_key_db) break; 1739 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 1740 hci_run(); 1741 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 1742 return; 1743 1744 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 1745 reverse_bd_addr(&packet[2], addr); 1746 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 1747 if (!conn) break; 1748 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 1749 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 1750 // Change Connection Encryption keeps link key type 1751 if (link_key_type != CHANGED_COMBINATION_KEY){ 1752 conn->link_key_type = link_key_type; 1753 } 1754 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 1755 // still forward event to allow dismiss of pairing dialog 1756 break; 1757 } 1758 1759 case HCI_EVENT_PIN_CODE_REQUEST: 1760 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 1761 // non-bondable mode: pin code negative reply will be sent 1762 if (!hci_stack->bondable){ 1763 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 1764 hci_run(); 1765 return; 1766 } 1767 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 1768 if (!hci_stack->link_key_db) break; 1769 hci_event_pin_code_request_get_bd_addr(packet, addr); 1770 hci_stack->link_key_db->delete_link_key(addr); 1771 break; 1772 1773 case HCI_EVENT_IO_CAPABILITY_REQUEST: 1774 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 1775 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 1776 break; 1777 1778 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 1779 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1780 if (!hci_stack->ssp_auto_accept) break; 1781 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 1782 break; 1783 1784 case HCI_EVENT_USER_PASSKEY_REQUEST: 1785 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 1786 if (!hci_stack->ssp_auto_accept) break; 1787 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 1788 break; 1789 #endif 1790 1791 case HCI_EVENT_ENCRYPTION_CHANGE: 1792 handle = little_endian_read_16(packet, 3); 1793 conn = hci_connection_for_handle(handle); 1794 if (!conn) break; 1795 if (packet[2] == 0) { 1796 if (packet[5]){ 1797 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1798 } else { 1799 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 1800 } 1801 } 1802 #ifdef ENABLE_CLASSIC 1803 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1804 #endif 1805 break; 1806 1807 #ifdef ENABLE_CLASSIC 1808 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 1809 handle = little_endian_read_16(packet, 3); 1810 conn = hci_connection_for_handle(handle); 1811 if (!conn) break; 1812 1813 // dedicated bonding: send result and disconnect 1814 if (conn->bonding_flags & BONDING_DEDICATED){ 1815 conn->bonding_flags &= ~BONDING_DEDICATED; 1816 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 1817 conn->bonding_status = packet[2]; 1818 break; 1819 } 1820 1821 if (packet[2] == 0 && gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level){ 1822 // link key sufficient for requested security 1823 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 1824 break; 1825 } 1826 // not enough 1827 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 1828 break; 1829 #endif 1830 1831 // HCI_EVENT_DISCONNECTION_COMPLETE 1832 // has been split, to first notify stack before shutting connection down 1833 // see end of function, too. 1834 case HCI_EVENT_DISCONNECTION_COMPLETE: 1835 if (packet[2]) break; // status != 0 1836 handle = little_endian_read_16(packet, 3); 1837 // drop outgoing ACL fragments if it is for closed connection 1838 if (hci_stack->acl_fragmentation_total_size > 0) { 1839 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 1840 log_info("hci: drop fragmented ACL data for closed connection"); 1841 hci_stack->acl_fragmentation_total_size = 0; 1842 hci_stack->acl_fragmentation_pos = 0; 1843 } 1844 } 1845 1846 // re-enable advertisements for le connections if active 1847 conn = hci_connection_for_handle(handle); 1848 if (!conn) break; 1849 #ifdef ENABLE_BLE 1850 #ifdef ENABLE_LE_PERIPHERAL 1851 if (hci_is_le_connection(conn) && hci_stack->le_advertisements_enabled){ 1852 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1853 } 1854 #endif 1855 #endif 1856 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 1857 break; 1858 1859 case HCI_EVENT_HARDWARE_ERROR: 1860 log_error("Hardware Error: 0x%02x", packet[2]); 1861 if (hci_stack->hardware_error_callback){ 1862 (*hci_stack->hardware_error_callback)(packet[2]); 1863 } else { 1864 // if no special requests, just reboot stack 1865 hci_power_control_off(); 1866 hci_power_control_on(); 1867 } 1868 break; 1869 1870 #ifdef ENABLE_CLASSIC 1871 case HCI_EVENT_ROLE_CHANGE: 1872 if (packet[2]) break; // status != 0 1873 handle = little_endian_read_16(packet, 3); 1874 conn = hci_connection_for_handle(handle); 1875 if (!conn) break; // no conn 1876 conn->role = packet[9]; 1877 break; 1878 #endif 1879 1880 case HCI_EVENT_TRANSPORT_PACKET_SENT: 1881 // release packet buffer only for asynchronous transport and if there are not further fragements 1882 if (hci_transport_synchronous()) { 1883 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 1884 return; // instead of break: to avoid re-entering hci_run() 1885 } 1886 if (hci_stack->acl_fragmentation_total_size) break; 1887 hci_release_packet_buffer(); 1888 1889 // L2CAP receives this event via the hci_emit_event below 1890 1891 #ifdef ENABLE_CLASSIC 1892 // For SCO, we do the can_send_now_check here 1893 hci_notify_if_sco_can_send_now(); 1894 #endif 1895 break; 1896 1897 #ifdef ENABLE_CLASSIC 1898 case HCI_EVENT_SCO_CAN_SEND_NOW: 1899 // For SCO, we do the can_send_now_check here 1900 hci_notify_if_sco_can_send_now(); 1901 return; 1902 #endif 1903 1904 #ifdef ENABLE_BLE 1905 case HCI_EVENT_LE_META: 1906 switch (packet[2]){ 1907 #ifdef ENABLE_LE_CENTRAL 1908 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 1909 // log_info("advertising report received"); 1910 if (hci_stack->le_scanning_state != LE_SCANNING) break; 1911 le_handle_advertisement_report(packet, size); 1912 break; 1913 #endif 1914 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 1915 // Connection management 1916 reverse_bd_addr(&packet[8], addr); 1917 addr_type = (bd_addr_type_t)packet[7]; 1918 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 1919 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 1920 #ifdef ENABLE_LE_CENTRAL 1921 // if auto-connect, remove from whitelist in both roles 1922 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 1923 hci_remove_from_whitelist(addr_type, addr); 1924 } 1925 // handle error: error is reported only to the initiator -> outgoing connection 1926 if (packet[3]){ 1927 // outgoing connection establishment is done 1928 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1929 // remove entry 1930 if (conn){ 1931 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1932 btstack_memory_hci_connection_free( conn ); 1933 } 1934 break; 1935 } 1936 #endif 1937 // on success, both hosts receive connection complete event 1938 if (packet[6] == HCI_ROLE_MASTER){ 1939 #ifdef ENABLE_LE_CENTRAL 1940 // if we're master, it was an outgoing connection and we're done with it 1941 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 1942 #endif 1943 } else { 1944 #ifdef ENABLE_LE_PERIPHERAL 1945 // if we're slave, it was an incoming connection, advertisements have stopped 1946 hci_stack->le_advertisements_active = 0; 1947 // try to re-enable them 1948 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1949 #endif 1950 } 1951 // LE connections are auto-accepted, so just create a connection if there isn't one already 1952 if (!conn){ 1953 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 1954 } 1955 // no memory, sorry. 1956 if (!conn){ 1957 break; 1958 } 1959 1960 conn->state = OPEN; 1961 conn->role = packet[6]; 1962 conn->con_handle = little_endian_read_16(packet, 4); 1963 1964 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 1965 1966 // restart timer 1967 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 1968 // btstack_run_loop_add_timer(&conn->timeout); 1969 1970 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1971 1972 hci_emit_nr_connections_changed(); 1973 break; 1974 1975 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 1976 1977 default: 1978 break; 1979 } 1980 break; 1981 #endif 1982 default: 1983 break; 1984 } 1985 1986 // handle BT initialization 1987 if (hci_stack->state == HCI_STATE_INITIALIZING){ 1988 hci_initializing_event_handler(packet, size); 1989 } 1990 1991 // help with BT sleep 1992 if (hci_stack->state == HCI_STATE_FALLING_ASLEEP 1993 && hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE 1994 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)){ 1995 hci_initializing_next_state(); 1996 } 1997 1998 // notify upper stack 1999 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2000 2001 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2002 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2003 if (!packet[2]){ 2004 handle = little_endian_read_16(packet, 3); 2005 hci_connection_t * aConn = hci_connection_for_handle(handle); 2006 if (aConn) { 2007 uint8_t status = aConn->bonding_status; 2008 uint16_t flags = aConn->bonding_flags; 2009 bd_addr_t bd_address; 2010 memcpy(&bd_address, aConn->address, 6); 2011 hci_shutdown_connection(aConn); 2012 // connection struct is gone, don't access anymore 2013 if (flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2014 hci_emit_dedicated_bonding_result(bd_address, status); 2015 } 2016 } 2017 } 2018 } 2019 2020 // execute main loop 2021 hci_run(); 2022 } 2023 2024 #ifdef ENABLE_CLASSIC 2025 static void sco_handler(uint8_t * packet, uint16_t size){ 2026 if (!hci_stack->sco_packet_handler) return; 2027 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2028 } 2029 #endif 2030 2031 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2032 hci_dump_packet(packet_type, 1, packet, size); 2033 switch (packet_type) { 2034 case HCI_EVENT_PACKET: 2035 event_handler(packet, size); 2036 break; 2037 case HCI_ACL_DATA_PACKET: 2038 acl_handler(packet, size); 2039 break; 2040 #ifdef ENABLE_CLASSIC 2041 case HCI_SCO_DATA_PACKET: 2042 sco_handler(packet, size); 2043 break; 2044 #endif 2045 default: 2046 break; 2047 } 2048 } 2049 2050 /** 2051 * @brief Add event packet handler. 2052 */ 2053 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2054 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2055 } 2056 2057 2058 /** Register HCI packet handlers */ 2059 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2060 hci_stack->acl_packet_handler = handler; 2061 } 2062 2063 #ifdef ENABLE_CLASSIC 2064 /** 2065 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2066 */ 2067 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2068 hci_stack->sco_packet_handler = handler; 2069 } 2070 #endif 2071 2072 static void hci_state_reset(void){ 2073 // no connections yet 2074 hci_stack->connections = NULL; 2075 2076 // keep discoverable/connectable as this has been requested by the client(s) 2077 // hci_stack->discoverable = 0; 2078 // hci_stack->connectable = 0; 2079 // hci_stack->bondable = 1; 2080 2081 // buffer is free 2082 hci_stack->hci_packet_buffer_reserved = 0; 2083 2084 // no pending cmds 2085 hci_stack->decline_reason = 0; 2086 hci_stack->new_scan_enable_value = 0xff; 2087 2088 // LE 2089 #ifdef ENABLE_LE_PERIPHERAL 2090 hci_stack->adv_addr_type = 0; 2091 hci_stack->le_advertisements_random_address_set = 0; 2092 memset(hci_stack->adv_address, 0, 6); 2093 #endif 2094 #ifdef ENABLE_LE_CENTRAL 2095 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2096 hci_stack->le_scan_type = 0xff; 2097 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2098 hci_stack->le_whitelist = 0; 2099 hci_stack->le_whitelist_capacity = 0; 2100 #endif 2101 2102 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 2103 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 2104 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 2105 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 2106 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 2107 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 2108 } 2109 2110 #ifdef ENABLE_CLASSIC 2111 /** 2112 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2113 */ 2114 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2115 // store and open remote device db 2116 hci_stack->link_key_db = link_key_db; 2117 if (hci_stack->link_key_db) { 2118 hci_stack->link_key_db->open(); 2119 } 2120 } 2121 #endif 2122 2123 void hci_init(const hci_transport_t *transport, const void *config){ 2124 2125 #ifdef HAVE_MALLOC 2126 if (!hci_stack) { 2127 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2128 } 2129 #else 2130 hci_stack = &hci_stack_static; 2131 #endif 2132 memset(hci_stack, 0, sizeof(hci_stack_t)); 2133 2134 // reference to use transport layer implementation 2135 hci_stack->hci_transport = transport; 2136 2137 // reference to used config 2138 hci_stack->config = config; 2139 2140 // setup pointer for outgoing packet buffer 2141 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2142 2143 // max acl payload size defined in config.h 2144 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2145 2146 // register packet handlers with transport 2147 transport->register_packet_handler(&packet_handler); 2148 2149 hci_stack->state = HCI_STATE_OFF; 2150 2151 // class of device 2152 hci_stack->class_of_device = 0x007a020c; // Smartphone 2153 2154 // bondable by default 2155 hci_stack->bondable = 1; 2156 2157 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 2158 hci_stack->ssp_enable = 1; 2159 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 2160 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 2161 hci_stack->ssp_auto_accept = 1; 2162 2163 // voice setting - signed 8 bit pcm data with CVSD over the air 2164 hci_stack->sco_voice_setting = 0x40; 2165 2166 hci_state_reset(); 2167 } 2168 2169 /** 2170 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 2171 */ 2172 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 2173 hci_stack->chipset = chipset_driver; 2174 2175 // reset chipset driver - init is also called on power_up 2176 if (hci_stack->chipset && hci_stack->chipset->init){ 2177 hci_stack->chipset->init(hci_stack->config); 2178 } 2179 } 2180 2181 /** 2182 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 2183 */ 2184 void hci_set_control(const btstack_control_t *hardware_control){ 2185 // references to used control implementation 2186 hci_stack->control = hardware_control; 2187 // init with transport config 2188 hardware_control->init(hci_stack->config); 2189 } 2190 2191 void hci_close(void){ 2192 // close remote device db 2193 if (hci_stack->link_key_db) { 2194 hci_stack->link_key_db->close(); 2195 } 2196 2197 btstack_linked_list_iterator_t lit; 2198 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 2199 while (btstack_linked_list_iterator_has_next(&lit)){ 2200 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 2201 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 2202 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 2203 hci_shutdown_connection(connection); 2204 } 2205 2206 hci_power_control(HCI_POWER_OFF); 2207 2208 #ifdef HAVE_MALLOC 2209 free(hci_stack); 2210 #endif 2211 hci_stack = NULL; 2212 } 2213 2214 #ifdef ENABLE_CLASSIC 2215 void gap_set_class_of_device(uint32_t class_of_device){ 2216 hci_stack->class_of_device = class_of_device; 2217 } 2218 2219 void hci_disable_l2cap_timeout_check(void){ 2220 disable_l2cap_timeouts = 1; 2221 } 2222 #endif 2223 2224 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 2225 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 2226 void hci_set_bd_addr(bd_addr_t addr){ 2227 memcpy(hci_stack->custom_bd_addr, addr, 6); 2228 hci_stack->custom_bd_addr_set = 1; 2229 } 2230 #endif 2231 2232 // State-Module-Driver overview 2233 // state module low-level 2234 // HCI_STATE_OFF off close 2235 // HCI_STATE_INITIALIZING, on open 2236 // HCI_STATE_WORKING, on open 2237 // HCI_STATE_HALTING, on open 2238 // HCI_STATE_SLEEPING, off/sleep close 2239 // HCI_STATE_FALLING_ASLEEP on open 2240 2241 static int hci_power_control_on(void){ 2242 2243 // power on 2244 int err = 0; 2245 if (hci_stack->control && hci_stack->control->on){ 2246 err = (*hci_stack->control->on)(); 2247 } 2248 if (err){ 2249 log_error( "POWER_ON failed"); 2250 hci_emit_hci_open_failed(); 2251 return err; 2252 } 2253 2254 // int chipset driver 2255 if (hci_stack->chipset && hci_stack->chipset->init){ 2256 hci_stack->chipset->init(hci_stack->config); 2257 } 2258 2259 // init transport 2260 if (hci_stack->hci_transport->init){ 2261 hci_stack->hci_transport->init(hci_stack->config); 2262 } 2263 2264 // open transport 2265 err = hci_stack->hci_transport->open(); 2266 if (err){ 2267 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2268 if (hci_stack->control && hci_stack->control->off){ 2269 (*hci_stack->control->off)(); 2270 } 2271 hci_emit_hci_open_failed(); 2272 return err; 2273 } 2274 return 0; 2275 } 2276 2277 static void hci_power_control_off(void){ 2278 2279 log_info("hci_power_control_off"); 2280 2281 // close low-level device 2282 hci_stack->hci_transport->close(); 2283 2284 log_info("hci_power_control_off - hci_transport closed"); 2285 2286 // power off 2287 if (hci_stack->control && hci_stack->control->off){ 2288 (*hci_stack->control->off)(); 2289 } 2290 2291 log_info("hci_power_control_off - control closed"); 2292 2293 hci_stack->state = HCI_STATE_OFF; 2294 } 2295 2296 static void hci_power_control_sleep(void){ 2297 2298 log_info("hci_power_control_sleep"); 2299 2300 #if 0 2301 // don't close serial port during sleep 2302 2303 // close low-level device 2304 hci_stack->hci_transport->close(hci_stack->config); 2305 #endif 2306 2307 // sleep mode 2308 if (hci_stack->control && hci_stack->control->sleep){ 2309 (*hci_stack->control->sleep)(); 2310 } 2311 2312 hci_stack->state = HCI_STATE_SLEEPING; 2313 } 2314 2315 static int hci_power_control_wake(void){ 2316 2317 log_info("hci_power_control_wake"); 2318 2319 // wake on 2320 if (hci_stack->control && hci_stack->control->wake){ 2321 (*hci_stack->control->wake)(); 2322 } 2323 2324 #if 0 2325 // open low-level device 2326 int err = hci_stack->hci_transport->open(hci_stack->config); 2327 if (err){ 2328 log_error( "HCI_INIT failed, turning Bluetooth off again"); 2329 if (hci_stack->control && hci_stack->control->off){ 2330 (*hci_stack->control->off)(); 2331 } 2332 hci_emit_hci_open_failed(); 2333 return err; 2334 } 2335 #endif 2336 2337 return 0; 2338 } 2339 2340 static void hci_power_transition_to_initializing(void){ 2341 // set up state machine 2342 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 2343 hci_stack->hci_packet_buffer_reserved = 0; 2344 hci_stack->state = HCI_STATE_INITIALIZING; 2345 hci_stack->substate = HCI_INIT_SEND_RESET; 2346 } 2347 2348 int hci_power_control(HCI_POWER_MODE power_mode){ 2349 2350 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 2351 2352 int err = 0; 2353 switch (hci_stack->state){ 2354 2355 case HCI_STATE_OFF: 2356 switch (power_mode){ 2357 case HCI_POWER_ON: 2358 err = hci_power_control_on(); 2359 if (err) { 2360 log_error("hci_power_control_on() error %d", err); 2361 return err; 2362 } 2363 hci_power_transition_to_initializing(); 2364 break; 2365 case HCI_POWER_OFF: 2366 // do nothing 2367 break; 2368 case HCI_POWER_SLEEP: 2369 // do nothing (with SLEEP == OFF) 2370 break; 2371 } 2372 break; 2373 2374 case HCI_STATE_INITIALIZING: 2375 switch (power_mode){ 2376 case HCI_POWER_ON: 2377 // do nothing 2378 break; 2379 case HCI_POWER_OFF: 2380 // no connections yet, just turn it off 2381 hci_power_control_off(); 2382 break; 2383 case HCI_POWER_SLEEP: 2384 // no connections yet, just turn it off 2385 hci_power_control_sleep(); 2386 break; 2387 } 2388 break; 2389 2390 case HCI_STATE_WORKING: 2391 switch (power_mode){ 2392 case HCI_POWER_ON: 2393 // do nothing 2394 break; 2395 case HCI_POWER_OFF: 2396 // see hci_run 2397 hci_stack->state = HCI_STATE_HALTING; 2398 break; 2399 case HCI_POWER_SLEEP: 2400 // see hci_run 2401 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2402 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2403 break; 2404 } 2405 break; 2406 2407 case HCI_STATE_HALTING: 2408 switch (power_mode){ 2409 case HCI_POWER_ON: 2410 hci_power_transition_to_initializing(); 2411 break; 2412 case HCI_POWER_OFF: 2413 // do nothing 2414 break; 2415 case HCI_POWER_SLEEP: 2416 // see hci_run 2417 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 2418 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 2419 break; 2420 } 2421 break; 2422 2423 case HCI_STATE_FALLING_ASLEEP: 2424 switch (power_mode){ 2425 case HCI_POWER_ON: 2426 2427 #ifdef HAVE_PLATFORM_IPHONE_OS 2428 // nothing to do, if H4 supports power management 2429 if (btstack_control_iphone_power_management_enabled()){ 2430 hci_stack->state = HCI_STATE_INITIALIZING; 2431 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 2432 break; 2433 } 2434 #endif 2435 hci_power_transition_to_initializing(); 2436 break; 2437 case HCI_POWER_OFF: 2438 // see hci_run 2439 hci_stack->state = HCI_STATE_HALTING; 2440 break; 2441 case HCI_POWER_SLEEP: 2442 // do nothing 2443 break; 2444 } 2445 break; 2446 2447 case HCI_STATE_SLEEPING: 2448 switch (power_mode){ 2449 case HCI_POWER_ON: 2450 2451 #ifdef HAVE_PLATFORM_IPHONE_OS 2452 // nothing to do, if H4 supports power management 2453 if (btstack_control_iphone_power_management_enabled()){ 2454 hci_stack->state = HCI_STATE_INITIALIZING; 2455 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 2456 hci_update_scan_enable(); 2457 break; 2458 } 2459 #endif 2460 err = hci_power_control_wake(); 2461 if (err) return err; 2462 hci_power_transition_to_initializing(); 2463 break; 2464 case HCI_POWER_OFF: 2465 hci_stack->state = HCI_STATE_HALTING; 2466 break; 2467 case HCI_POWER_SLEEP: 2468 // do nothing 2469 break; 2470 } 2471 break; 2472 } 2473 2474 // create internal event 2475 hci_emit_state(); 2476 2477 // trigger next/first action 2478 hci_run(); 2479 2480 return 0; 2481 } 2482 2483 2484 #ifdef ENABLE_CLASSIC 2485 2486 static void hci_update_scan_enable(void){ 2487 // 2 = page scan, 1 = inq scan 2488 hci_stack->new_scan_enable_value = hci_stack->connectable << 1 | hci_stack->discoverable; 2489 hci_run(); 2490 } 2491 2492 void gap_discoverable_control(uint8_t enable){ 2493 if (enable) enable = 1; // normalize argument 2494 2495 if (hci_stack->discoverable == enable){ 2496 hci_emit_discoverable_enabled(hci_stack->discoverable); 2497 return; 2498 } 2499 2500 hci_stack->discoverable = enable; 2501 hci_update_scan_enable(); 2502 } 2503 2504 void gap_connectable_control(uint8_t enable){ 2505 if (enable) enable = 1; // normalize argument 2506 2507 // don't emit event 2508 if (hci_stack->connectable == enable) return; 2509 2510 hci_stack->connectable = enable; 2511 hci_update_scan_enable(); 2512 } 2513 #endif 2514 2515 void gap_local_bd_addr(bd_addr_t address_buffer){ 2516 memcpy(address_buffer, hci_stack->local_bd_addr, 6); 2517 } 2518 2519 static void hci_run(void){ 2520 2521 // log_info("hci_run: entered"); 2522 btstack_linked_item_t * it; 2523 2524 // send continuation fragments first, as they block the prepared packet buffer 2525 if (hci_stack->acl_fragmentation_total_size > 0) { 2526 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 2527 hci_connection_t *connection = hci_connection_for_handle(con_handle); 2528 if (connection) { 2529 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 2530 hci_send_acl_packet_fragments(connection); 2531 return; 2532 } 2533 } else { 2534 // connection gone -> discard further fragments 2535 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 2536 hci_stack->acl_fragmentation_total_size = 0; 2537 hci_stack->acl_fragmentation_pos = 0; 2538 } 2539 } 2540 2541 if (!hci_can_send_command_packet_now()) return; 2542 2543 // global/non-connection oriented commands 2544 2545 #ifdef ENABLE_CLASSIC 2546 // decline incoming connections 2547 if (hci_stack->decline_reason){ 2548 uint8_t reason = hci_stack->decline_reason; 2549 hci_stack->decline_reason = 0; 2550 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 2551 return; 2552 } 2553 2554 // send scan enable 2555 if (hci_stack->state == HCI_STATE_WORKING && hci_stack->new_scan_enable_value != 0xff && hci_classic_supported()){ 2556 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 2557 hci_stack->new_scan_enable_value = 0xff; 2558 return; 2559 } 2560 #endif 2561 2562 #ifdef ENABLE_BLE 2563 if (hci_stack->state == HCI_STATE_WORKING){ 2564 2565 #ifdef ENABLE_LE_CENTRAL 2566 // handle le scan 2567 switch(hci_stack->le_scanning_state){ 2568 case LE_START_SCAN: 2569 hci_stack->le_scanning_state = LE_SCANNING; 2570 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 2571 return; 2572 2573 case LE_STOP_SCAN: 2574 hci_stack->le_scanning_state = LE_SCAN_IDLE; 2575 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 2576 return; 2577 default: 2578 break; 2579 } 2580 if (hci_stack->le_scan_type != 0xff){ 2581 // defaults: active scanning, accept all advertisement packets 2582 int scan_type = hci_stack->le_scan_type; 2583 hci_stack->le_scan_type = 0xff; 2584 hci_send_cmd(&hci_le_set_scan_parameters, scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->adv_addr_type, 0); 2585 return; 2586 } 2587 #endif 2588 #ifdef ENABLE_LE_PERIPHERAL 2589 // le advertisement control 2590 if (hci_stack->le_advertisements_todo){ 2591 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 2592 } 2593 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 2594 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 2595 hci_send_cmd(&hci_le_set_advertise_enable, 0); 2596 return; 2597 } 2598 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 2599 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 2600 hci_send_cmd(&hci_le_set_advertising_parameters, 2601 hci_stack->le_advertisements_interval_min, 2602 hci_stack->le_advertisements_interval_max, 2603 hci_stack->le_advertisements_type, 2604 hci_stack->le_advertisements_own_address_type, 2605 hci_stack->le_advertisements_direct_address_type, 2606 hci_stack->le_advertisements_direct_address, 2607 hci_stack->le_advertisements_channel_map, 2608 hci_stack->le_advertisements_filter_policy); 2609 return; 2610 } 2611 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 2612 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 2613 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, 2614 hci_stack->le_advertisements_data); 2615 return; 2616 } 2617 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 2618 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 2619 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, 2620 hci_stack->le_scan_response_data); 2621 return; 2622 } 2623 // Random address needs to be set before enabling advertisements 2624 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE) 2625 && (hci_stack->le_advertisements_own_address_type == 0 || hci_stack->le_advertisements_random_address_set)){ 2626 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 2627 hci_send_cmd(&hci_le_set_advertise_enable, 1); 2628 return; 2629 } 2630 #endif 2631 2632 #ifdef ENABLE_LE_CENTRAL 2633 // 2634 // LE Whitelist Management 2635 // 2636 2637 // check if whitelist needs modification 2638 btstack_linked_list_iterator_t lit; 2639 int modification_pending = 0; 2640 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2641 while (btstack_linked_list_iterator_has_next(&lit)){ 2642 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2643 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 2644 modification_pending = 1; 2645 break; 2646 } 2647 } 2648 2649 if (modification_pending){ 2650 // stop connnecting if modification pending 2651 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 2652 hci_send_cmd(&hci_le_create_connection_cancel); 2653 return; 2654 } 2655 2656 // add/remove entries 2657 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2658 while (btstack_linked_list_iterator_has_next(&lit)){ 2659 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2660 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 2661 entry->state = LE_WHITELIST_ON_CONTROLLER; 2662 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 2663 return; 2664 2665 } 2666 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 2667 bd_addr_t address; 2668 bd_addr_type_t address_type = entry->address_type; 2669 memcpy(address, entry->address, 6); 2670 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2671 btstack_memory_whitelist_entry_free(entry); 2672 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 2673 return; 2674 } 2675 } 2676 } 2677 2678 // start connecting 2679 if ( hci_stack->le_connecting_state == LE_CONNECTING_IDLE && 2680 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 2681 bd_addr_t null_addr; 2682 memset(null_addr, 0, 6); 2683 hci_send_cmd(&hci_le_create_connection, 2684 0x0060, // scan interval: 60 ms 2685 0x0030, // scan interval: 30 ms 2686 1, // use whitelist 2687 0, // peer address type 2688 null_addr, // peer bd addr 2689 hci_stack->adv_addr_type, // our addr type: 2690 0x0008, // conn interval min 2691 0x0018, // conn interval max 2692 0, // conn latency 2693 0x0048, // supervision timeout 2694 0x0001, // min ce length 2695 0x0001 // max ce length 2696 ); 2697 return; 2698 } 2699 #endif 2700 } 2701 #endif 2702 2703 // send pending HCI commands 2704 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 2705 hci_connection_t * connection = (hci_connection_t *) it; 2706 2707 switch(connection->state){ 2708 case SEND_CREATE_CONNECTION: 2709 switch(connection->address_type){ 2710 #ifdef ENABLE_CLASSIC 2711 case BD_ADDR_TYPE_CLASSIC: 2712 log_info("sending hci_create_connection"); 2713 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, 1); 2714 break; 2715 #endif 2716 default: 2717 #ifdef ENABLE_BLE 2718 #ifdef ENABLE_LE_CENTRAL 2719 log_info("sending hci_le_create_connection"); 2720 hci_send_cmd(&hci_le_create_connection, 2721 0x0060, // scan interval: 60 ms 2722 0x0030, // scan interval: 30 ms 2723 0, // don't use whitelist 2724 connection->address_type, // peer address type 2725 connection->address, // peer bd addr 2726 hci_stack->adv_addr_type, // our addr type: 2727 0x0008, // conn interval min 2728 0x0018, // conn interval max 2729 0, // conn latency 2730 0x0048, // supervision timeout 2731 0x0001, // min ce length 2732 0x0001 // max ce length 2733 ); 2734 2735 connection->state = SENT_CREATE_CONNECTION; 2736 #endif 2737 #endif 2738 break; 2739 } 2740 return; 2741 2742 #ifdef ENABLE_CLASSIC 2743 case RECEIVED_CONNECTION_REQUEST: 2744 log_info("sending hci_accept_connection_request, remote eSCO %u", connection->remote_supported_feature_eSCO); 2745 connection->state = ACCEPTED_CONNECTION_REQUEST; 2746 connection->role = HCI_ROLE_SLAVE; 2747 if (connection->address_type == BD_ADDR_TYPE_CLASSIC){ 2748 hci_send_cmd(&hci_accept_connection_request, connection->address, 1); 2749 } 2750 return; 2751 #endif 2752 2753 #ifdef ENABLE_BLE 2754 #ifdef ENABLE_LE_CENTRAL 2755 case SEND_CANCEL_CONNECTION: 2756 connection->state = SENT_CANCEL_CONNECTION; 2757 hci_send_cmd(&hci_le_create_connection_cancel); 2758 return; 2759 #endif 2760 #endif 2761 case SEND_DISCONNECT: 2762 connection->state = SENT_DISCONNECT; 2763 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2764 return; 2765 2766 default: 2767 break; 2768 } 2769 2770 #ifdef ENABLE_CLASSIC 2771 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 2772 log_info("responding to link key request"); 2773 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 2774 link_key_t link_key; 2775 link_key_type_t link_key_type; 2776 if ( hci_stack->link_key_db 2777 && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type) 2778 && gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level){ 2779 connection->link_key_type = link_key_type; 2780 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 2781 } else { 2782 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 2783 } 2784 return; 2785 } 2786 2787 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 2788 log_info("denying to pin request"); 2789 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 2790 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 2791 return; 2792 } 2793 2794 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 2795 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 2796 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2797 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2798 // tweak authentication requirements 2799 uint8_t authreq = hci_stack->ssp_authentication_requirement; 2800 if (connection->bonding_flags & BONDING_DEDICATED){ 2801 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2802 } 2803 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 2804 authreq |= 1; 2805 } 2806 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 2807 } else { 2808 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 2809 } 2810 return; 2811 } 2812 2813 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 2814 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 2815 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 2816 return; 2817 } 2818 2819 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 2820 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 2821 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 2822 return; 2823 } 2824 2825 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES){ 2826 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES; 2827 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 2828 return; 2829 } 2830 2831 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 2832 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 2833 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 2834 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // authentication done 2835 return; 2836 } 2837 2838 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 2839 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 2840 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 2841 return; 2842 } 2843 2844 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 2845 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 2846 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 2847 return; 2848 } 2849 #endif 2850 2851 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 2852 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 2853 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x0005); // authentication failure 2854 return; 2855 } 2856 2857 #ifdef ENABLE_BLE 2858 if (connection->le_con_parameter_update_state == CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS){ 2859 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 2860 2861 uint16_t connection_interval_min = connection->le_conn_interval_min; 2862 connection->le_conn_interval_min = 0; 2863 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection_interval_min, 2864 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 2865 0x0000, 0xffff); 2866 } 2867 #endif 2868 } 2869 2870 hci_connection_t * connection; 2871 switch (hci_stack->state){ 2872 case HCI_STATE_INITIALIZING: 2873 hci_initializing_run(); 2874 break; 2875 2876 case HCI_STATE_HALTING: 2877 2878 log_info("HCI_STATE_HALTING"); 2879 2880 // free whitelist entries 2881 #ifdef ENABLE_BLE 2882 #ifdef ENABLE_LE_CENTRAL 2883 { 2884 btstack_linked_list_iterator_t lit; 2885 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 2886 while (btstack_linked_list_iterator_has_next(&lit)){ 2887 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 2888 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 2889 btstack_memory_whitelist_entry_free(entry); 2890 } 2891 } 2892 #endif 2893 #endif 2894 // close all open connections 2895 connection = (hci_connection_t *) hci_stack->connections; 2896 if (connection){ 2897 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 2898 if (!hci_can_send_command_packet_now()) return; 2899 2900 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 2901 2902 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 2903 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 2904 2905 // ... which would be ignored anyway as we shutdown (free) the connection now 2906 hci_shutdown_connection(connection); 2907 2908 // finally, send the disconnect command 2909 hci_send_cmd(&hci_disconnect, con_handle, 0x13); // remote closed connection 2910 return; 2911 } 2912 log_info("HCI_STATE_HALTING, calling off"); 2913 2914 // switch mode 2915 hci_power_control_off(); 2916 2917 log_info("HCI_STATE_HALTING, emitting state"); 2918 hci_emit_state(); 2919 log_info("HCI_STATE_HALTING, done"); 2920 break; 2921 2922 case HCI_STATE_FALLING_ASLEEP: 2923 switch(hci_stack->substate) { 2924 case HCI_FALLING_ASLEEP_DISCONNECT: 2925 log_info("HCI_STATE_FALLING_ASLEEP"); 2926 // close all open connections 2927 connection = (hci_connection_t *) hci_stack->connections; 2928 2929 #ifdef HAVE_PLATFORM_IPHONE_OS 2930 // don't close connections, if H4 supports power management 2931 if (btstack_control_iphone_power_management_enabled()){ 2932 connection = NULL; 2933 } 2934 #endif 2935 if (connection){ 2936 2937 // send disconnect 2938 if (!hci_can_send_command_packet_now()) return; 2939 2940 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 2941 hci_send_cmd(&hci_disconnect, connection->con_handle, 0x13); // remote closed connection 2942 2943 // send disconnected event right away - causes higher layer connections to get closed, too. 2944 hci_shutdown_connection(connection); 2945 return; 2946 } 2947 2948 if (hci_classic_supported()){ 2949 // disable page and inquiry scan 2950 if (!hci_can_send_command_packet_now()) return; 2951 2952 log_info("HCI_STATE_HALTING, disabling inq scans"); 2953 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 2954 2955 // continue in next sub state 2956 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 2957 break; 2958 } 2959 // no break - fall through for ble-only chips 2960 2961 case HCI_FALLING_ASLEEP_COMPLETE: 2962 log_info("HCI_STATE_HALTING, calling sleep"); 2963 #ifdef HAVE_PLATFORM_IPHONE_OS 2964 // don't actually go to sleep, if H4 supports power management 2965 if (btstack_control_iphone_power_management_enabled()){ 2966 // SLEEP MODE reached 2967 hci_stack->state = HCI_STATE_SLEEPING; 2968 hci_emit_state(); 2969 break; 2970 } 2971 #endif 2972 // switch mode 2973 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 2974 hci_emit_state(); 2975 break; 2976 2977 default: 2978 break; 2979 } 2980 break; 2981 2982 default: 2983 break; 2984 } 2985 } 2986 2987 int hci_send_cmd_packet(uint8_t *packet, int size){ 2988 // house-keeping 2989 2990 if (IS_COMMAND(packet, hci_write_loopback_mode)){ 2991 hci_stack->loopback_mode = packet[3]; 2992 } 2993 2994 #ifdef ENABLE_CLASSIC 2995 bd_addr_t addr; 2996 hci_connection_t * conn; 2997 2998 // create_connection? 2999 if (IS_COMMAND(packet, hci_create_connection)){ 3000 reverse_bd_addr(&packet[3], addr); 3001 log_info("Create_connection to %s", bd_addr_to_str(addr)); 3002 3003 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3004 if (!conn){ 3005 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3006 if (!conn){ 3007 // notify client that alloc failed 3008 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3009 return 0; // don't sent packet to controller 3010 } 3011 conn->state = SEND_CREATE_CONNECTION; 3012 } 3013 log_info("conn state %u", conn->state); 3014 switch (conn->state){ 3015 // if connection active exists 3016 case OPEN: 3017 // and OPEN, emit connection complete command, don't send to controller 3018 hci_emit_connection_complete(addr, conn->con_handle, 0); 3019 return 0; 3020 case SEND_CREATE_CONNECTION: 3021 // connection created by hci, e.g. dedicated bonding 3022 break; 3023 default: 3024 // otherwise, just ignore as it is already in the open process 3025 return 0; 3026 } 3027 conn->state = SENT_CREATE_CONNECTION; 3028 } 3029 3030 if (IS_COMMAND(packet, hci_link_key_request_reply)){ 3031 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 3032 } 3033 if (IS_COMMAND(packet, hci_link_key_request_negative_reply)){ 3034 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 3035 } 3036 3037 if (IS_COMMAND(packet, hci_delete_stored_link_key)){ 3038 if (hci_stack->link_key_db){ 3039 reverse_bd_addr(&packet[3], addr); 3040 hci_stack->link_key_db->delete_link_key(addr); 3041 } 3042 } 3043 3044 if (IS_COMMAND(packet, hci_pin_code_request_negative_reply) 3045 || IS_COMMAND(packet, hci_pin_code_request_reply)){ 3046 reverse_bd_addr(&packet[3], addr); 3047 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3048 if (conn){ 3049 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 3050 } 3051 } 3052 3053 if (IS_COMMAND(packet, hci_user_confirmation_request_negative_reply) 3054 || IS_COMMAND(packet, hci_user_confirmation_request_reply) 3055 || IS_COMMAND(packet, hci_user_passkey_request_negative_reply) 3056 || IS_COMMAND(packet, hci_user_passkey_request_reply)) { 3057 reverse_bd_addr(&packet[3], addr); 3058 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_CLASSIC); 3059 if (conn){ 3060 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 3061 } 3062 } 3063 #endif 3064 3065 #ifdef ENABLE_BLE 3066 #ifdef ENABLE_LE_PERIPHERAL 3067 if (IS_COMMAND(packet, hci_le_set_random_address)){ 3068 hci_stack->le_advertisements_random_address_set = 1; 3069 reverse_bd_addr(&packet[3], hci_stack->adv_address); 3070 } 3071 if (IS_COMMAND(packet, hci_le_set_advertising_parameters)){ 3072 hci_stack->adv_addr_type = packet[8]; 3073 } 3074 if (IS_COMMAND(packet, hci_le_set_advertise_enable)){ 3075 hci_stack->le_advertisements_active = packet[3]; 3076 } 3077 #endif 3078 #ifdef ENABLE_LE_CENTRAL 3079 if (IS_COMMAND(packet, hci_le_create_connection)){ 3080 // white list used? 3081 uint8_t initiator_filter_policy = packet[7]; 3082 switch (initiator_filter_policy){ 3083 case 0: 3084 // whitelist not used 3085 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 3086 break; 3087 case 1: 3088 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 3089 break; 3090 default: 3091 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 3092 break; 3093 } 3094 } 3095 if (IS_COMMAND(packet, hci_le_create_connection_cancel)){ 3096 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3097 } 3098 #endif 3099 #endif 3100 3101 hci_stack->num_cmd_packets--; 3102 3103 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3104 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3105 3106 // release packet buffer for synchronous transport implementations 3107 if (hci_transport_synchronous() && (packet == hci_stack->hci_packet_buffer)){ 3108 hci_stack->hci_packet_buffer_reserved = 0; 3109 } 3110 3111 return err; 3112 } 3113 3114 // disconnect because of security block 3115 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 3116 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3117 if (!connection) return; 3118 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3119 } 3120 3121 3122 // Configure Secure Simple Pairing 3123 3124 #ifdef ENABLE_CLASSIC 3125 3126 // enable will enable SSP during init 3127 void gap_ssp_set_enable(int enable){ 3128 hci_stack->ssp_enable = enable; 3129 } 3130 3131 static int hci_local_ssp_activated(void){ 3132 return gap_ssp_supported() && hci_stack->ssp_enable; 3133 } 3134 3135 // if set, BTstack will respond to io capability request using authentication requirement 3136 void gap_ssp_set_io_capability(int io_capability){ 3137 hci_stack->ssp_io_capability = io_capability; 3138 } 3139 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 3140 hci_stack->ssp_authentication_requirement = authentication_requirement; 3141 } 3142 3143 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 3144 void gap_ssp_set_auto_accept(int auto_accept){ 3145 hci_stack->ssp_auto_accept = auto_accept; 3146 } 3147 #endif 3148 3149 // va_list part of hci_send_cmd 3150 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 3151 if (!hci_can_send_command_packet_now()){ 3152 log_error("hci_send_cmd called but cannot send packet now"); 3153 return 0; 3154 } 3155 3156 // for HCI INITIALIZATION 3157 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 3158 hci_stack->last_cmd_opcode = cmd->opcode; 3159 3160 hci_reserve_packet_buffer(); 3161 uint8_t * packet = hci_stack->hci_packet_buffer; 3162 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 3163 return hci_send_cmd_packet(packet, size); 3164 } 3165 3166 /** 3167 * pre: numcmds >= 0 - it's allowed to send a command to the controller 3168 */ 3169 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 3170 va_list argptr; 3171 va_start(argptr, cmd); 3172 int res = hci_send_cmd_va_arg(cmd, argptr); 3173 va_end(argptr); 3174 return res; 3175 } 3176 3177 // Create various non-HCI events. 3178 // TODO: generalize, use table similar to hci_create_command 3179 3180 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 3181 // dump packet 3182 if (dump) { 3183 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 3184 } 3185 3186 // dispatch to all event handlers 3187 btstack_linked_list_iterator_t it; 3188 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 3189 while (btstack_linked_list_iterator_has_next(&it)){ 3190 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 3191 entry->callback(HCI_EVENT_PACKET, 0, event, size); 3192 } 3193 } 3194 3195 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 3196 if (!hci_stack->acl_packet_handler) return; 3197 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 3198 } 3199 3200 #ifdef ENABLE_CLASSIC 3201 static void hci_notify_if_sco_can_send_now(void){ 3202 // notify SCO sender if waiting 3203 if (!hci_stack->sco_waiting_for_can_send_now) return; 3204 if (hci_can_send_sco_packet_now()){ 3205 hci_stack->sco_waiting_for_can_send_now = 0; 3206 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 3207 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 3208 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 3209 } 3210 } 3211 #endif 3212 3213 void hci_emit_state(void){ 3214 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 3215 uint8_t event[3]; 3216 event[0] = BTSTACK_EVENT_STATE; 3217 event[1] = sizeof(event) - 2; 3218 event[2] = hci_stack->state; 3219 hci_emit_event(event, sizeof(event), 1); 3220 } 3221 3222 #ifdef ENABLE_CLASSIC 3223 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3224 uint8_t event[13]; 3225 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 3226 event[1] = sizeof(event) - 2; 3227 event[2] = status; 3228 little_endian_store_16(event, 3, con_handle); 3229 reverse_bd_addr(address, &event[5]); 3230 event[11] = 1; // ACL connection 3231 event[12] = 0; // encryption disabled 3232 hci_emit_event(event, sizeof(event), 1); 3233 } 3234 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 3235 if (disable_l2cap_timeouts) return; 3236 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 3237 uint8_t event[4]; 3238 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 3239 event[1] = sizeof(event) - 2; 3240 little_endian_store_16(event, 2, conn->con_handle); 3241 hci_emit_event(event, sizeof(event), 1); 3242 } 3243 #endif 3244 3245 #ifdef ENABLE_BLE 3246 #ifdef ENABLE_LE_CENTRAL 3247 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 3248 uint8_t event[21]; 3249 event[0] = HCI_EVENT_LE_META; 3250 event[1] = sizeof(event) - 2; 3251 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 3252 event[3] = status; 3253 little_endian_store_16(event, 4, con_handle); 3254 event[6] = 0; // TODO: role 3255 event[7] = address_type; 3256 reverse_bd_addr(address, &event[8]); 3257 little_endian_store_16(event, 14, 0); // interval 3258 little_endian_store_16(event, 16, 0); // latency 3259 little_endian_store_16(event, 18, 0); // supervision timeout 3260 event[20] = 0; // master clock accuracy 3261 hci_emit_event(event, sizeof(event), 1); 3262 } 3263 #endif 3264 #endif 3265 3266 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 3267 uint8_t event[6]; 3268 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 3269 event[1] = sizeof(event) - 2; 3270 event[2] = 0; // status = OK 3271 little_endian_store_16(event, 3, con_handle); 3272 event[5] = reason; 3273 hci_emit_event(event, sizeof(event), 1); 3274 } 3275 3276 static void hci_emit_nr_connections_changed(void){ 3277 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 3278 uint8_t event[3]; 3279 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 3280 event[1] = sizeof(event) - 2; 3281 event[2] = nr_hci_connections(); 3282 hci_emit_event(event, sizeof(event), 1); 3283 } 3284 3285 static void hci_emit_hci_open_failed(void){ 3286 log_info("BTSTACK_EVENT_POWERON_FAILED"); 3287 uint8_t event[2]; 3288 event[0] = BTSTACK_EVENT_POWERON_FAILED; 3289 event[1] = sizeof(event) - 2; 3290 hci_emit_event(event, sizeof(event), 1); 3291 } 3292 3293 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 3294 log_info("hci_emit_dedicated_bonding_result %u ", status); 3295 uint8_t event[9]; 3296 int pos = 0; 3297 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 3298 event[pos++] = sizeof(event) - 2; 3299 event[pos++] = status; 3300 reverse_bd_addr(address, &event[pos]); 3301 hci_emit_event(event, sizeof(event), 1); 3302 } 3303 3304 3305 #ifdef ENABLE_CLASSIC 3306 3307 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 3308 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 3309 uint8_t event[5]; 3310 int pos = 0; 3311 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 3312 event[pos++] = sizeof(event) - 2; 3313 little_endian_store_16(event, 2, con_handle); 3314 pos += 2; 3315 event[pos++] = level; 3316 hci_emit_event(event, sizeof(event), 1); 3317 } 3318 3319 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 3320 if (!connection) return LEVEL_0; 3321 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 3322 return gap_security_level_for_link_key_type(connection->link_key_type); 3323 } 3324 3325 static void hci_emit_discoverable_enabled(uint8_t enabled){ 3326 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 3327 uint8_t event[3]; 3328 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 3329 event[1] = sizeof(event) - 2; 3330 event[2] = enabled; 3331 hci_emit_event(event, sizeof(event), 1); 3332 } 3333 3334 #ifdef ENABLE_CLASSIC 3335 // query if remote side supports eSCO 3336 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 3337 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3338 if (!connection) return 0; 3339 return connection->remote_supported_feature_eSCO; 3340 } 3341 3342 // query if remote side supports SSP 3343 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 3344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3345 if (!connection) return 0; 3346 return (connection->bonding_flags & BONDING_REMOTE_SUPPORTS_SSP) ? 1 : 0; 3347 } 3348 3349 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 3350 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 3351 } 3352 #endif 3353 3354 // GAP API 3355 /** 3356 * @bbrief enable/disable bonding. default is enabled 3357 * @praram enabled 3358 */ 3359 void gap_set_bondable_mode(int enable){ 3360 hci_stack->bondable = enable ? 1 : 0; 3361 } 3362 /** 3363 * @brief Get bondable mode. 3364 * @return 1 if bondable 3365 */ 3366 int gap_get_bondable_mode(void){ 3367 return hci_stack->bondable; 3368 } 3369 3370 /** 3371 * @brief map link keys to security levels 3372 */ 3373 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 3374 switch (link_key_type){ 3375 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 3376 return LEVEL_4; 3377 case COMBINATION_KEY: 3378 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 3379 return LEVEL_3; 3380 default: 3381 return LEVEL_2; 3382 } 3383 } 3384 3385 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 3386 log_info("gap_mitm_protection_required_for_security_level %u", level); 3387 return level > LEVEL_2; 3388 } 3389 3390 /** 3391 * @brief get current security level 3392 */ 3393 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 3394 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3395 if (!connection) return LEVEL_0; 3396 return gap_security_level_for_connection(connection); 3397 } 3398 3399 /** 3400 * @brief request connection to device to 3401 * @result GAP_AUTHENTICATION_RESULT 3402 */ 3403 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 3404 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3405 if (!connection){ 3406 hci_emit_security_level(con_handle, LEVEL_0); 3407 return; 3408 } 3409 gap_security_level_t current_level = gap_security_level(con_handle); 3410 log_info("gap_request_security_level %u, current level %u", requested_level, current_level); 3411 if (current_level >= requested_level){ 3412 hci_emit_security_level(con_handle, current_level); 3413 return; 3414 } 3415 3416 connection->requested_security_level = requested_level; 3417 3418 #if 0 3419 // sending encryption request without a link key results in an error. 3420 // TODO: figure out how to use it properly 3421 3422 // would enabling ecnryption suffice (>= LEVEL_2)? 3423 if (hci_stack->link_key_db){ 3424 link_key_type_t link_key_type; 3425 link_key_t link_key; 3426 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 3427 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 3428 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3429 return; 3430 } 3431 } 3432 } 3433 #endif 3434 3435 // try to authenticate connection 3436 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 3437 hci_run(); 3438 } 3439 3440 /** 3441 * @brief start dedicated bonding with device. disconnect after bonding 3442 * @param device 3443 * @param request MITM protection 3444 * @result GAP_DEDICATED_BONDING_COMPLETE 3445 */ 3446 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 3447 3448 // create connection state machine 3449 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_CLASSIC); 3450 3451 if (!connection){ 3452 return BTSTACK_MEMORY_ALLOC_FAILED; 3453 } 3454 3455 // delete linkn key 3456 gap_drop_link_key_for_bd_addr(device); 3457 3458 // configure LEVEL_2/3, dedicated bonding 3459 connection->state = SEND_CREATE_CONNECTION; 3460 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 3461 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 3462 connection->bonding_flags = BONDING_DEDICATED; 3463 3464 // wait for GAP Security Result and send GAP Dedicated Bonding complete 3465 3466 // handle: connnection failure (connection complete != ok) 3467 // handle: authentication failure 3468 // handle: disconnect on done 3469 3470 hci_run(); 3471 3472 return 0; 3473 } 3474 #endif 3475 3476 void gap_set_local_name(const char * local_name){ 3477 hci_stack->local_name = local_name; 3478 } 3479 3480 3481 #ifdef ENABLE_BLE 3482 3483 #ifdef ENABLE_LE_CENTRAL 3484 void gap_start_scan(void){ 3485 if (hci_stack->le_scanning_state == LE_SCANNING) return; 3486 hci_stack->le_scanning_state = LE_START_SCAN; 3487 hci_run(); 3488 } 3489 3490 void gap_stop_scan(void){ 3491 if ( hci_stack->le_scanning_state == LE_SCAN_IDLE) return; 3492 hci_stack->le_scanning_state = LE_STOP_SCAN; 3493 hci_run(); 3494 } 3495 3496 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 3497 hci_stack->le_scan_type = scan_type; 3498 hci_stack->le_scan_interval = scan_interval; 3499 hci_stack->le_scan_window = scan_window; 3500 hci_run(); 3501 } 3502 3503 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 3504 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3505 if (!conn){ 3506 log_info("gap_connect: no connection exists yet, creating context"); 3507 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3508 if (!conn){ 3509 // notify client that alloc failed 3510 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 3511 log_info("gap_connect: failed to alloc hci_connection_t"); 3512 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 3513 } 3514 conn->state = SEND_CREATE_CONNECTION; 3515 log_info("gap_connect: send create connection next"); 3516 hci_run(); 3517 return 0; 3518 } 3519 3520 if (!hci_is_le_connection(conn) || 3521 conn->state == SEND_CREATE_CONNECTION || 3522 conn->state == SENT_CREATE_CONNECTION) { 3523 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 3524 log_error("gap_connect: classic connection or connect is already being created"); 3525 return GATT_CLIENT_IN_WRONG_STATE; 3526 } 3527 3528 log_info("gap_connect: context exists with state %u", conn->state); 3529 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 3530 hci_run(); 3531 return 0; 3532 } 3533 3534 // @assumption: only a single outgoing LE Connection exists 3535 static hci_connection_t * gap_get_outgoing_connection(void){ 3536 btstack_linked_item_t *it; 3537 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3538 hci_connection_t * conn = (hci_connection_t *) it; 3539 if (!hci_is_le_connection(conn)) continue; 3540 switch (conn->state){ 3541 case SEND_CREATE_CONNECTION: 3542 case SENT_CREATE_CONNECTION: 3543 return conn; 3544 default: 3545 break; 3546 }; 3547 } 3548 return NULL; 3549 } 3550 3551 uint8_t gap_connect_cancel(void){ 3552 hci_connection_t * conn = gap_get_outgoing_connection(); 3553 if (!conn) return 0; 3554 switch (conn->state){ 3555 case SEND_CREATE_CONNECTION: 3556 // skip sending create connection and emit event instead 3557 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 3558 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3559 btstack_memory_hci_connection_free( conn ); 3560 break; 3561 case SENT_CREATE_CONNECTION: 3562 // request to send cancel connection 3563 conn->state = SEND_CANCEL_CONNECTION; 3564 hci_run(); 3565 break; 3566 default: 3567 break; 3568 } 3569 return 0; 3570 } 3571 #endif 3572 3573 /** 3574 * @brief Updates the connection parameters for a given LE connection 3575 * @param handle 3576 * @param conn_interval_min (unit: 1.25ms) 3577 * @param conn_interval_max (unit: 1.25ms) 3578 * @param conn_latency 3579 * @param supervision_timeout (unit: 10ms) 3580 * @returns 0 if ok 3581 */ 3582 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3583 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3584 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3585 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3586 connection->le_conn_interval_min = conn_interval_min; 3587 connection->le_conn_interval_max = conn_interval_max; 3588 connection->le_conn_latency = conn_latency; 3589 connection->le_supervision_timeout = supervision_timeout; 3590 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 3591 hci_run(); 3592 return 0; 3593 } 3594 3595 /** 3596 * @brief Request an update of the connection parameter for a given LE connection 3597 * @param handle 3598 * @param conn_interval_min (unit: 1.25ms) 3599 * @param conn_interval_max (unit: 1.25ms) 3600 * @param conn_latency 3601 * @param supervision_timeout (unit: 10ms) 3602 * @returns 0 if ok 3603 */ 3604 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 3605 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 3606 hci_connection_t * connection = hci_connection_for_handle(con_handle); 3607 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 3608 connection->le_conn_interval_min = conn_interval_min; 3609 connection->le_conn_interval_max = conn_interval_max; 3610 connection->le_conn_latency = conn_latency; 3611 connection->le_supervision_timeout = supervision_timeout; 3612 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 3613 hci_run(); 3614 return 0; 3615 } 3616 3617 #ifdef ENABLE_LE_PERIPHERAL 3618 3619 static void gap_advertisments_changed(void){ 3620 // disable advertisements before updating adv, scan data, or adv params 3621 if (hci_stack->le_advertisements_active){ 3622 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 3623 } 3624 hci_run(); 3625 } 3626 3627 /** 3628 * @brief Set Advertisement Data 3629 * @param advertising_data_length 3630 * @param advertising_data (max 31 octets) 3631 * @note data is not copied, pointer has to stay valid 3632 */ 3633 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 3634 hci_stack->le_advertisements_data_len = advertising_data_length; 3635 hci_stack->le_advertisements_data = advertising_data; 3636 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3637 gap_advertisments_changed(); 3638 } 3639 3640 /** 3641 * @brief Set Scan Response Data 3642 * @param advertising_data_length 3643 * @param advertising_data (max 31 octets) 3644 * @note data is not copied, pointer has to stay valid 3645 */ 3646 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 3647 hci_stack->le_scan_response_data_len = scan_response_data_length; 3648 hci_stack->le_scan_response_data = scan_response_data; 3649 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3650 gap_advertisments_changed(); 3651 } 3652 3653 /** 3654 * @brief Set Advertisement Parameters 3655 * @param adv_int_min 3656 * @param adv_int_max 3657 * @param adv_type 3658 * @param own_address_type 3659 * @param direct_address_type 3660 * @param direct_address 3661 * @param channel_map 3662 * @param filter_policy 3663 * 3664 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 3665 */ 3666 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 3667 uint8_t own_address_type, uint8_t direct_address_typ, bd_addr_t direct_address, 3668 uint8_t channel_map, uint8_t filter_policy) { 3669 3670 hci_stack->le_advertisements_interval_min = adv_int_min; 3671 hci_stack->le_advertisements_interval_max = adv_int_max; 3672 hci_stack->le_advertisements_type = adv_type; 3673 hci_stack->le_advertisements_own_address_type = own_address_type; 3674 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 3675 hci_stack->le_advertisements_channel_map = channel_map; 3676 hci_stack->le_advertisements_filter_policy = filter_policy; 3677 memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6); 3678 3679 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3680 gap_advertisments_changed(); 3681 } 3682 3683 void hci_le_advertisements_set_own_address_type(uint8_t own_address_type){ 3684 hci_stack->le_advertisements_own_address_type = own_address_type; 3685 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3686 gap_advertisments_changed(); 3687 } 3688 3689 /** 3690 * @brief Enable/Disable Advertisements 3691 * @param enabled 3692 */ 3693 void gap_advertisements_enable(int enabled){ 3694 hci_stack->le_advertisements_enabled = enabled; 3695 if (enabled && !hci_stack->le_advertisements_active){ 3696 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 3697 } 3698 if (!enabled && hci_stack->le_advertisements_active){ 3699 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 3700 } 3701 hci_run(); 3702 } 3703 3704 #endif 3705 #endif 3706 3707 uint8_t gap_disconnect(hci_con_handle_t handle){ 3708 hci_connection_t * conn = hci_connection_for_handle(handle); 3709 if (!conn){ 3710 hci_emit_disconnection_complete(handle, 0); 3711 return 0; 3712 } 3713 conn->state = SEND_DISCONNECT; 3714 hci_run(); 3715 return 0; 3716 } 3717 3718 /** 3719 * @brief Get connection type 3720 * @param con_handle 3721 * @result connection_type 3722 */ 3723 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 3724 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 3725 if (!conn) return GAP_CONNECTION_INVALID; 3726 switch (conn->address_type){ 3727 case BD_ADDR_TYPE_LE_PUBLIC: 3728 case BD_ADDR_TYPE_LE_RANDOM: 3729 return GAP_CONNECTION_LE; 3730 case BD_ADDR_TYPE_SCO: 3731 return GAP_CONNECTION_SCO; 3732 case BD_ADDR_TYPE_CLASSIC: 3733 return GAP_CONNECTION_ACL; 3734 default: 3735 return GAP_CONNECTION_INVALID; 3736 } 3737 } 3738 3739 #ifdef ENABLE_BLE 3740 3741 #ifdef ENABLE_LE_CENTRAL 3742 /** 3743 * @brief Auto Connection Establishment - Start Connecting to device 3744 * @param address_typ 3745 * @param address 3746 * @returns 0 if ok 3747 */ 3748 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 3749 // check capacity 3750 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 3751 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 3752 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 3753 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 3754 entry->address_type = address_type; 3755 memcpy(entry->address, address, 6); 3756 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 3757 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 3758 hci_run(); 3759 return 0; 3760 } 3761 3762 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 3763 btstack_linked_list_iterator_t it; 3764 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3765 while (btstack_linked_list_iterator_has_next(&it)){ 3766 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3767 if (entry->address_type != address_type) continue; 3768 if (memcmp(entry->address, address, 6) != 0) continue; 3769 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3770 // remove from controller if already present 3771 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3772 continue; 3773 } 3774 // direclty remove entry from whitelist 3775 btstack_linked_list_iterator_remove(&it); 3776 btstack_memory_whitelist_entry_free(entry); 3777 } 3778 } 3779 3780 /** 3781 * @brief Auto Connection Establishment - Stop Connecting to device 3782 * @param address_typ 3783 * @param address 3784 * @returns 0 if ok 3785 */ 3786 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 3787 hci_remove_from_whitelist(address_type, address); 3788 hci_run(); 3789 return 0; 3790 } 3791 3792 /** 3793 * @brief Auto Connection Establishment - Stop everything 3794 * @note Convenience function to stop all active auto connection attempts 3795 */ 3796 void gap_auto_connection_stop_all(void){ 3797 btstack_linked_list_iterator_t it; 3798 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 3799 while (btstack_linked_list_iterator_has_next(&it)){ 3800 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 3801 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 3802 // remove from controller if already present 3803 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3804 continue; 3805 } 3806 // directly remove entry from whitelist 3807 btstack_linked_list_iterator_remove(&it); 3808 btstack_memory_whitelist_entry_free(entry); 3809 } 3810 hci_run(); 3811 } 3812 #endif 3813 #endif 3814 3815 #ifdef ENABLE_CLASSIC 3816 /** 3817 * @brief Set Extended Inquiry Response data 3818 * @param eir_data size 240 bytes, is not copied make sure memory is accessible during stack startup 3819 * @note has to be done before stack starts up 3820 */ 3821 void gap_set_extended_inquiry_response(const uint8_t * data){ 3822 hci_stack->eir_data = data; 3823 } 3824 3825 /** 3826 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 3827 * @param inquriy_mode see bluetooth_defines.h 3828 */ 3829 void hci_set_inquiry_mode(inquiry_mode_t mode){ 3830 hci_stack->inquiry_mode = mode; 3831 } 3832 3833 /** 3834 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 3835 */ 3836 void hci_set_sco_voice_setting(uint16_t voice_setting){ 3837 hci_stack->sco_voice_setting = voice_setting; 3838 } 3839 3840 /** 3841 * @brief Get SCO Voice Setting 3842 * @return current voice setting 3843 */ 3844 uint16_t hci_get_sco_voice_setting(void){ 3845 return hci_stack->sco_voice_setting; 3846 } 3847 3848 /** @brief Get SCO packet length for current SCO Voice setting 3849 * @note Using SCO packets of the exact length is required for USB transfer 3850 * @return Length of SCO packets in bytes (not audio frames) 3851 */ 3852 int hci_get_sco_packet_length(void){ 3853 // see Core Spec for H2 USB Transfer. 3854 if (hci_stack->sco_voice_setting & 0x0020) return 51; 3855 return 27; 3856 } 3857 #endif 3858 3859 /** 3860 * @brief Set callback for Bluetooth Hardware Error 3861 */ 3862 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 3863 hci_stack->hardware_error_callback = fn; 3864 } 3865 3866 void hci_disconnect_all(void){ 3867 btstack_linked_list_iterator_t it; 3868 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 3869 while (btstack_linked_list_iterator_has_next(&it)){ 3870 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 3871 if (con->state == SENT_DISCONNECT) continue; 3872 con->state = SEND_DISCONNECT; 3873 } 3874 hci_run(); 3875 } 3876 3877 uint16_t hci_get_manufacturer(void){ 3878 return hci_stack->manufacturer; 3879 } 3880